diff --git a/core/bulkchange.class.inc.php b/core/bulkchange.class.inc.php
deleted file mode 100644
index 1865fafc4..000000000
--- a/core/bulkchange.class.inc.php
+++ /dev/null
@@ -1,1673 +0,0 @@
-<?php
-/*
- * @copyright   Copyright (C) 2010-2024 Combodo SAS
- * @license     http://opensource.org/licenses/AGPL-3.0
- */
-
-// The BOM is added at the head of exported UTF-8 CSV data, and removed (if present) from input UTF-8 data.
-// This helps MS-Excel (Version > 2007, Windows only) in changing its interpretation of a CSV file (by default Excel reads data as ISO-8859-1 -not 100% sure!)
-use Combodo\iTop\Application\WebPage\iTopWebPage;
-use Combodo\iTop\Application\WebPage\WebPage;
-
-define('UTF8_BOM', chr(239).chr(187).chr(191)); // 0xEF, 0xBB, 0xBF
-
-
-/**
- * CellChangeSpec
- * A series of classes, keeping the information about a given cell: could it be changed or not (and why)?
- *
- * @package     iTopORM
- */
-abstract class CellChangeSpec
-{
-	protected $m_proposedValue;
-	protected $m_sOql; // in case of ambiguity
-
-	public function __construct($proposedValue, $sOql = '')
-	{
-		$this->m_proposedValue = $proposedValue;
-		$this->m_sOql = $sOql;
-	}
-
-	public function GetPureValue()
-	{
-		// Todo - distinguish both values
-		return $this->m_proposedValue;
-	}
-
-	/**
-	 * @throws \Exception
-	 * @since 3.2.0
-	 */
-	public function GetCLIValue(bool $bLocalizedValues = false): string
-	{
-		if (is_object($this->m_proposedValue))	{
-			if ($this->m_proposedValue instanceof ReportValue) {
-				return $this->m_proposedValue->GetAsCSV($bLocalizedValues, ',', '"');
-			}
-			throw new Exception('Unexpected class : '. get_class($this->m_proposedValue));
-		}
-		return $this->m_proposedValue;
-	}
-
-	/**
-	 * @throws \Exception
-	 * @since 3.2.0
-	 */
-	public function GetHTMLValue(bool $bLocalizedValues = false): string
-	{
-		if (is_object($this->m_proposedValue)) {
-			if ($this->m_proposedValue instanceof ReportValue) {
-				return $this->m_proposedValue->GetAsHTML($bLocalizedValues);
-			}
-			throw new Exception('Unexpected class : '. get_class($this->m_proposedValue));
-		}
-		return utils::EscapeHtml($this->m_proposedValue);
-	}
-
-
-	/**
-	 * @since 3.1.0 N°5305
-	 */
-	public function SetDisplayableValue(string $sDisplayableValue)
-	{
-		$this->m_proposedValue = $sDisplayableValue;
-	}
-
-	public function GetOql()
-	{
-		return $this->m_sOql;
-	}
-
-	/**
-	 * @since 3.2.0
-	 */
-	public function GetCLIValueAndDescription(): string
-	{
-		return sprintf("%s%s",
-			$this->GetCLIValue(),
-			$this->GetDescription()
-		);
-	}
-
-	abstract public function GetDescription();
-}
-
-
-class CellStatus_Void extends CellChangeSpec
-{
-	public function GetDescription()
-	{
-		return '';
-	}
-}
-
-class CellStatus_Modify extends CellChangeSpec
-{
-	protected $m_previousValue;
-
-	public function __construct($proposedValue, $previousValue = null)
-	{
-		// Unused (could be costly to know -see the case of reconciliation on ext keys)
-		//$this->m_previousValue = $previousValue;
-		parent::__construct($proposedValue);
-	}
-
-	public function GetDescription()
-	{
-		return Dict::S('UI:CSVReport-Value-Modified');
-	}
-
-	//public function GetPreviousValue()
-	//{
-	//	return $this->m_previousValue;
-	//}
-}
-
-class CellStatus_Issue extends CellStatus_Modify
-{
-	protected $m_sReason;
-
-	public function __construct($proposedValue, $previousValue, $sReason)
-	{
-		$this->m_sReason = $sReason;
-		parent::__construct($proposedValue, $previousValue);
-	}
-
-	public function GetCLIValue(bool $bLocalizedValues = false): string
-	{
-		if (is_null($this->m_proposedValue)) {
-			return Dict::Format('UI:CSVReport-Value-SetIssue');
-		}
-		return Dict::Format('UI:CSVReport-Value-ChangeIssue',$this->m_proposedValue);
-	}
-
-	public function GetHTMLValue(bool $bLocalizedValues = false): string
-	{
-		if (is_null($this->m_proposedValue))
-		{
-			return Dict::Format('UI:CSVReport-Value-SetIssue');
-		}
-		if ($this->m_proposedValue instanceof ReportValue)
-		{
-			return Dict::Format('UI:CSVReport-Value-ChangeIssue', $this->m_proposedValue->GetAsHTML($bLocalizedValues));
-		}
-		return Dict::Format('UI:CSVReport-Value-ChangeIssue',utils::EscapeHtml($this->m_proposedValue));
-	}
-
-	public function GetDescription()
-	{
-		return $this->m_sReason;
-	}
-	/*
-	 * @since 3.2.0
-	 */
-	public function GetCLIValueAndDescription(): string
-	{
-		return sprintf("%s. %s",
-			$this->GetCLIValue(),
-			$this->GetDescription()
-		);
-	}
-}
-
-class CellStatus_SearchIssue extends CellStatus_Issue
-{
-	/** @var string|null $m_sAllowedValues */
-	private $m_sAllowedValues;
-
-	/**
-	 * @since 3.1.0 N°5305
-	 * @var string $sSerializedSearch
-	 */
-	private $sSerializedSearch;
-
-	/** @var string|null $m_sTargetClass */
-	private $m_sTargetClass;
-
-	/**
-	 * @since 3.1.0 N°5305
-	 * @var string $sAllowedValuesSearch
-	 */
-	private $sAllowedValuesSearch;
-
-	/**
-	 * CellStatus_SearchIssue constructor.
-	 * @since 3.1.0 N°5305
-	 *
-	 * @param string $sOql : main message
-	 * @param string $sReason : main message
-	 * @param null $sClass : used for additional message that provides allowed values for current class $sClass
-	 * @param null $sAllowedValues : used for additional message that provides allowed values $sAllowedValues for current class
-	 * @param string|null $sAllowedValuesSearch : used to search all allowed values
-	 */
-	public function __construct($sSerializedSearch, $sReason, $sClass = null, $sAllowedValues = null, string $sAllowedValuesSearch = null)
-	{
-		parent::__construct(null, null, $sReason);
-		$this->sSerializedSearch = $sSerializedSearch;
-		$this->m_sAllowedValues = $sAllowedValues;
-		$this->m_sTargetClass = $sClass;
-		$this->sAllowedValuesSearch = $sAllowedValuesSearch;
-	}
-
-	public function GetCLIValue(bool $bLocalizedValues = false): string
-	{
-		if (null === $this->m_sReason) {
-			return Dict::Format('UI:CSVReport-Value-NoMatch', '');
-		}
-
-		return $this->m_sReason;
-	}
-
-	public function GetHTMLValue(bool $bLocalizedValues = false): string
-	{
-		if (null === $this->m_sReason) {
-			return Dict::Format('UI:CSVReport-Value-NoMatch', '');
-		}
-
-		return utils::EscapeHtml($this->m_sReason);
-	}
-
-	public function GetDescription()
-	{
-		if (\utils::IsNullOrEmptyString($this->m_sAllowedValues) ||
-			\utils::IsNullOrEmptyString($this->m_sTargetClass)) {
-			return '';
-		}
-
-		return Dict::Format('UI:CSVReport-Value-NoMatch-PossibleValues', $this->m_sTargetClass, $this->m_sAllowedValues);
-	}
-
-	/**
-	 * @since 3.1.0 N°5305
-	 * @return string
-	 */
-	public function GetSearchLinkUrl()
-	{
-		return sprintf("UI.php?operation=search&filter=%s",
-			rawurlencode($this->sSerializedSearch ?? "")
-		);
-	}
-
-	/**
-	 * @since 3.1.0 N°5305
-	 * @return null|string
-	 */
-	public function GetAllowedValuesLinkUrl(): ?string
-	{
-		return sprintf("UI.php?operation=search&filter=%s",
-			rawurlencode($this->sAllowedValuesSearch ?? "")
-		);
-	}
-}
-
-class CellStatus_NullIssue extends CellStatus_Issue
-{
-	public function __construct()
-	{
-		parent::__construct(null, null, null);
-	}
-
-	public function GetDescription()
-	{
-		return Dict::S('UI:CSVReport-Value-Missing');
-	}
-}
-
-/**
- * Class to differ formatting depending on the caller
- */
-class ReportValue
-{
-	/**
-	 * @param DBObject $oObject
-	 * @param string $sAttCode
-	 * @param bool $bOriginal
-	 */
-	public function __construct(protected DBObject $oObject, protected string $sAttCode, protected  bool $bOriginal){}
-
-	public function GetAsHTML(bool $bLocalizedValues)
-	{
-		if ($this->bOriginal) {
-			return $this->oObject->GetOriginalAsHTML($this->sAttCode, $bLocalizedValues);
-		}
-		return $this->oObject->GetAsHTML($this->sAttCode, $bLocalizedValues);
-	}
-	public function GetAsCSV (bool $bLocalizedValues, string $sCsvSep, string $sCsvDelimiter) {
-		if ($this->bOriginal) {
-			return $this->oObject->GetOriginalAsCSV($this->sAttCode, $sCsvSep, $sCsvDelimiter, $bLocalizedValues);
-		}
-		return $this->oObject->GetAsCSV($this->sAttCode, $sCsvSep, $sCsvDelimiter, $bLocalizedValues);
-	}
-}
-
-
-class CellStatus_Ambiguous extends CellStatus_Issue
-{
-	protected $m_iCount;
-	/**
-	 * @since 3.1.0 N°5305
-	 * @var string
-	 */
-	protected $sSerializedSearch;
-
-	/**
-	 * @since 3.1.0 N°5305
-	 *
-	 * @param $previousValue
-	 * @param int $iCount
-	 * @param string $sSerializedSearch
-	 *
-	 */
-	public function __construct($previousValue, $iCount, $sSerializedSearch)
-	{
-		$this->m_iCount = $iCount;
-		$this->sSerializedSearch = $sSerializedSearch;
-		parent::__construct(null, $previousValue, '');
-	}
-
-	public function GetDescription()
-	{
-		$sCount = $this->m_iCount;
-		return Dict::Format('UI:CSVReport-Value-Ambiguous', $sCount);
-	}
-
-	/**
-	 * @since 3.1.0 N°5305
-	 * @return string
-	 */
-	public function GetSearchLinkUrl()
-	{
-		return sprintf("UI.php?operation=search&filter=%s",
-			rawurlencode($this->sSerializedSearch ?? "")
-		);
-	}
-}
-
-
-/**
- * RowStatus
- * A series of classes, keeping the information about a given row: could it be changed or not (and why)?
- *
- * @package     iTopORM
- */
-abstract class RowStatus
-{
-	public function __construct()
-	{
-	}
-
-	abstract public function GetDescription();
-}
-
-class RowStatus_NoChange extends RowStatus
-{
-	public function GetDescription()
-	{
-		return Dict::S('UI:CSVReport-Row-Unchanged');
-	}
-}
-
-class RowStatus_NewObj extends RowStatus
-{
-	public function GetDescription()
-	{
-		return Dict::S('UI:CSVReport-Row-Created');
-	}
-}
-
-class RowStatus_Modify extends RowStatus
-{
-	protected $m_iChanged;
-
-	public function __construct($iChanged)
-	{
-		$this->m_iChanged = $iChanged;
-	}
-
-	public function GetDescription()
-	{
-		return Dict::Format('UI:CSVReport-Row-Updated', $this->m_iChanged);
-	}
-}
-
-class RowStatus_Disappeared extends RowStatus_Modify
-{
-	public function GetDescription()
-	{
-		return Dict::Format('UI:CSVReport-Row-Disappeared', $this->m_iChanged);
-	}
-}
-
-class RowStatus_Issue extends RowStatus
-{
-	protected $m_sReason;
-
-	public function __construct($sReason)
-	{
-		$this->m_sReason = $sReason;
-	}
-
-	public function GetDescription()
-	{
-		return Dict::Format('UI:CSVReport-Row-Issue', $this->m_sReason);
-	}
-}
-
-/**
- * class dedicated to testability
- * not used/ignored in csv imports UI/CLI
- * @since 3.1.0 N°5305
- */
-class RowStatus_Error extends RowStatus
-{
-	/** @var string */
-	protected $m_sError;
-
-	public function __construct($sError)
-	{
-		$this->m_sError = $sError;
-	}
-
-	public function GetDescription()
-	{
-		return $this->m_sError;
-	}
-}
-
-/**
- * BulkChange
- * Interpret a given data set and update the DB accordingly (fake mode avail.)
- *
- * @package iTopORM
- */
-class BulkChange
-{
-	/** @var string */
-	protected $m_sClass;
-	protected $m_aData; // Note: hereafter, iCol maybe actually be any acceptable key (string)
-	// #@# todo: rename the variables to sColIndex
-	/** @var array<string, string> attcode as key, iCol as value */
-	protected $m_aAttList;
-	/** @var array<string, array<string, string>> sExtKeyAttCode as key, array of sExtReconcKeyAttCode/iCol as value */
-	protected $m_aExtKeys;
-	/** @var string[] list of attcode (attcode = 'id' for the pkey) */
-	protected $m_aReconcilKeys;
-	/** @var string OQL - if specified, then the missing items will be reported */
-	protected $m_sSynchroScope;
-	/**
-	 * @var array<string, mixed> attcode as key, attvalue as value. Values to be set when an object gets out of scope
-	 *                          (ignored if no scope has been defined)
-	 */
-	protected $m_aOnDisappear;
-	/**
-	 * @see DateTime::createFromFormat
-	 * @var string Date format specification
-	 */
-	protected $m_sDateFormat;
-	/**
-	 * @see AttributeEnum
-	 * @var boolean true if Values in the data set are localized
-	 */
-	protected $m_bLocalizedValues;
-	/** @var array Cache for resolving external keys based on the given search criterias */
-	protected $m_aExtKeysMappingCache;
-	/** @var int number of columns */
-	protected $m_iNbCol;
-
-	public function __construct($sClass, $aData, $aAttList, $aExtKeys, $aReconcilKeys, $sSynchroScope = null, $aOnDisappear = null, $sDateFormat = null, $bLocalize = false, $iNbCol = 0)
-	{
-		$this->m_sClass = $sClass;
-		$this->m_aData = $aData;
-		$this->m_aAttList = $aAttList;
-		$this->m_aReconcilKeys = $aReconcilKeys;
-		$this->m_aExtKeys = $aExtKeys;
-		$this->m_sSynchroScope = $sSynchroScope;
-		$this->m_aOnDisappear = $aOnDisappear;
-		$this->m_sDateFormat = $sDateFormat;
-		$this->m_bLocalizedValues = $bLocalize;
-		$this->m_aExtKeysMappingCache = array();
-		$this->m_iNbCol =$iNbCol;
-	}
-
-	protected function ResolveExternalKey($aRowData, $sAttCode, &$aResults)
-	{
-		$oExtKey = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
-		$oReconFilter = new DBObjectSearch($oExtKey->GetTargetClass());
-		foreach ($this->m_aExtKeys[$sAttCode] as $sReconKeyAttCode => $iCol)
-		{
-			if ($sReconKeyAttCode == 'id')
-			{
-				$value = (int) $aRowData[$iCol];
-			}
-			else
-			{
-				// The foreign attribute is one of our reconciliation key
-				$oForeignAtt = MetaModel::GetAttributeDef($oExtKey->GetTargetClass(), $sReconKeyAttCode);
-				$value = $oForeignAtt->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
-			}
-			$oReconFilter->AddCondition($sReconKeyAttCode, $value, '=');
-			$aResults[$iCol] = new CellStatus_Void($aRowData[$iCol]);
-		}
-
-		$oExtObjects = new CMDBObjectSet($oReconFilter);
-		$aKeys = $oExtObjects->ToArray();
-		return array($oReconFilter, $aKeys);
-	}
-
-	// Returns true if the CSV data specifies that the external key must be left undefined
-	protected function IsNullExternalKeySpec($aRowData, $sAttCode)
-	{
-		//$oExtKey = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
-		foreach ($this->m_aExtKeys[$sAttCode] as $sForeignAttCode => $iCol)
-		{
-			// The foreign attribute is one of our reconciliation key
-			if (isset($aRowData[$iCol]) && strlen($aRowData[$iCol]) > 0)
-			{
-				return false;
-			}
-		}
-		return true;
-	}
-
-	/**
-	 * @param DBObject $oTargetObj
-	 * @param array $aRowData
-	 * @param array $aErrors
-	 *
-	 * @return array
-	 * @throws \CoreException
-	 * @throws \CoreUnexpectedValue
-	 * @throws \MissingQueryArgument
-	 * @throws \MySQLException
-	 * @throws \MySQLHasGoneAwayException
-	 */
-	protected function PrepareObject(&$oTargetObj, $aRowData, &$aErrors)
-	{
-		$aResults = array();
-		$aErrors = array();
-
-		// External keys reconciliation
-		//
-		foreach($this->m_aExtKeys as $sAttCode => $aReconKeys)
-		{
-			// Skip external keys used for the reconciliation process
-			// if (!array_key_exists($sAttCode, $this->m_aAttList)) continue;
-
-			$oExtKey = MetaModel::GetAttributeDef(get_class($oTargetObj), $sAttCode);
-
-			if ($this->IsNullExternalKeySpec($aRowData, $sAttCode))
-			{
-				foreach ($aReconKeys as $sReconKeyAttCode => $iCol)
-				{
-					// Default reporting
-					// $aRowData[$iCol] is always null
-					$aResults[$iCol] = new CellStatus_Void($aRowData[$iCol]);
-				}
-				if ($oExtKey->IsNullAllowed())
-				{
-					$oTargetObj->Set($sAttCode, $oExtKey->GetNullValue());
-					$aResults[$sAttCode]= new CellStatus_Void($oExtKey->GetNullValue());
-				}
-				else
-				{
-					$aErrors[$sAttCode] = Dict::S('UI:CSVReport-Value-Issue-Null');
-					$aResults[$sAttCode]= new CellStatus_Issue(null, $oTargetObj->Get($sAttCode), Dict::S('UI:CSVReport-Value-Issue-Null'));
-				}
-			}
-			else
-			{
-				$oReconFilter = new DBObjectSearch($oExtKey->GetTargetClass());
-
-				$aCacheKeys = array();
-				foreach ($aReconKeys as $sReconKeyAttCode => $iCol)
-				{
-					// The foreign attribute is one of our reconciliation key
-					if ($sReconKeyAttCode == 'id')
-					{
-						$value = $aRowData[$iCol];
-					}
-					else
-					{
-						$oForeignAtt = MetaModel::GetAttributeDef($oExtKey->GetTargetClass(), $sReconKeyAttCode);
-						$value = $oForeignAtt->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
-					}
-					$aCacheKeys[] = $value;
-					$oReconFilter->AddCondition($sReconKeyAttCode, $value, '=');
-					$aResults[$iCol] = new CellStatus_Void($aRowData[$iCol]);
-				}
-				$sCacheKey = implode('_|_', $aCacheKeys); // Unique key for this query...
-				$iForeignKey = null;
-				// TODO: check if *too long* keys can lead to collisions... and skip the cache in such a case...
-				if (!array_key_exists($sAttCode, $this->m_aExtKeysMappingCache))
-				{
-					$this->m_aExtKeysMappingCache[$sAttCode] = array();
-				}
-				if (array_key_exists($sCacheKey, $this->m_aExtKeysMappingCache[$sAttCode]))
-				{
-					// Cache hit
-					$iObjectFoundCount = $this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey]['c'];
-					$iForeignKey = $this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey]['k'];
-					// Record the hit
-					$this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey]['h']++;
-				}
-				else
-				{
-					// Cache miss, let's initialize it
-					$oExtObjects = new CMDBObjectSet($oReconFilter);
-					$iObjectFoundCount = $oExtObjects->Count();
-					if ($iObjectFoundCount == 1)
-					{
-						$oForeignObj = $oExtObjects->Fetch();
-						$iForeignKey = $oForeignObj->GetKey();
-					}
-					$this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey] = array(
-						'c' => $iObjectFoundCount,
-						'k' => $iForeignKey,
-						'oql' => $oReconFilter->ToOql(),
-						'h' => 0, // number of hits on this cache entry
-					);
-				}
-				switch($iObjectFoundCount)
-				{
-					case 0:
-						$oCellStatus_SearchIssue = $this->GetCellSearchIssue($oReconFilter);
-						$aResults[$sAttCode] = $oCellStatus_SearchIssue;
-						$aErrors[$sAttCode] = Dict::S('UI:CSVReport-Value-Issue-NotFound');
-						break;
-
-					case 1:
-						// Do change the external key attribute
-						$oTargetObj->Set($sAttCode, $iForeignKey);
-						break;
-
-					default:
-						$aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-FoundMany', $iObjectFoundCount);
-						$aResults[$sAttCode]= new CellStatus_Ambiguous($oTargetObj->Get($sAttCode), $iObjectFoundCount, $oReconFilter->serialize());
-				}
-			}
-
-			// Report
-			if (!array_key_exists($sAttCode, $aResults))
-			{
-				$iForeignObj = $oTargetObj->Get($sAttCode);
-				if (array_key_exists($sAttCode, $oTargetObj->ListChanges()))
-				{
-					if ($oTargetObj->IsNew())
-					{
-						$aResults[$sAttCode]= new CellStatus_Void($iForeignObj);
-					}
-					else
-					{
-						$aResults[$sAttCode]= new CellStatus_Modify($iForeignObj, $oTargetObj->GetOriginal($sAttCode));
-						foreach ($aReconKeys as $sReconKeyAttCode => $iCol)
-						{
-							// Report the change on reconciliation values as well
-							$aResults[$iCol] = new CellStatus_Modify($aRowData[$iCol]);
-						}
-					}
-				}
-				else
-				{
-					$aResults[$sAttCode]= new CellStatus_Void($iForeignObj);
-				}
-			}
-		}
-
-		// Set the object attributes
-		//
-		foreach ($this->m_aAttList as $sAttCode => $iCol)
-		{
-			// skip the private key, if any
-			if (($sAttCode == 'id') || ($sAttCode == 'friendlyname')) {
-				continue;
-			}
-
-			$oAttDef = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
-
-			// skip reconciliation keys
-			if (!$oAttDef->IsWritable() && in_array($sAttCode, $this->m_aReconcilKeys)) {
-				continue;
-			}
-
-			$aReasons = array();
-			$iFlags = ($oTargetObj->IsNew())
-				? $oTargetObj->GetInitialStateAttributeFlags($sAttCode, $aReasons)
-				: $oTargetObj->GetAttributeFlags($sAttCode, $aReasons);
-			if ((($iFlags & OPT_ATT_READONLY) == OPT_ATT_READONLY) && ($oTargetObj->Get($sAttCode) != $oAttDef->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues))) {
-				$aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-Readonly', $sAttCode, $oTargetObj->Get($sAttCode), $aRowData[$iCol]);
-			}
-			else if ($oAttDef->IsLinkSet() && $oAttDef->IsIndirect())
-			{
-				try
-				{
-					$oSet = $oAttDef->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
-					$oTargetObj->Set($sAttCode, $oSet);
-				}
-				catch(CoreException $e)
-				{
-					$aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-Format', $e->getMessage());
-				}
-			}
-			else
-			{
-				$value = $oAttDef->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
-				if (is_null($value) && (strlen($aRowData[$iCol]) > 0))
-				{
-					if ($oAttDef instanceof AttributeEnum || $oAttDef instanceof AttributeTagSet){
-						/** @var AttributeDefinition $oAttributeDefinition */
-						$oAttributeDefinition = $oAttDef;
-						$aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-AllowedValues', $sAttCode, implode(',', $oAttributeDefinition->GetAllowedValues()));
-					} else {
-						$aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-NoMatch', $sAttCode);
-					}
-				}
-				else
-				{
-					$res = $oTargetObj->CheckValue($sAttCode, $value);
-					if ($res === true)
-					{
-						$oTargetObj->Set($sAttCode, $value);
-					}
-					else
-					{
-						// $res is a string with the error description
-						$aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-Unknown', $sAttCode, $res);
-					}
-				}
-			}
-		}
-
-		// Reporting on fields
-		//
-		$aChangedFields = $oTargetObj->ListChanges();
-		foreach ($this->m_aAttList as $sAttCode => $iCol) {
-			if ($sAttCode == 'id') {
-				$aResults[$iCol]= new CellStatus_Void($aRowData[$iCol]);
-			}
-			else {
-				$sCurValue = new ReportValue($oTargetObj, $sAttCode, false);
-				$sOrigValue = new ReportValue($oTargetObj, $sAttCode, true);
-				if (isset($aErrors[$sAttCode])) {
-					$aResults[$iCol]= new CellStatus_Issue($aRowData[$iCol], $sOrigValue, $aErrors[$sAttCode]);
-				}
-				elseif (array_key_exists($sAttCode, $aChangedFields)){
-					if ($oTargetObj->IsNew())	{
-						$aResults[$iCol]= new CellStatus_Void($sCurValue);
-					}
-					else	{
-						$aResults[$iCol]= new CellStatus_Modify($sCurValue, $sOrigValue);
-					}
-				}
-				else	{
-					// By default... nothing happens
-					$oAttDef = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
-					if ($oAttDef instanceof AttributeDateTime) {
-						$aResults[$iCol]= new CellStatus_Void($oAttDef->GetFormat()->Format($aRowData[$iCol]));
-					}
-					else	{
-						$aResults[$iCol]= new CellStatus_Void($aRowData[$iCol]);
-					}
-				}
-			}
-		}
-
-		// Checks
-		//
-		$res = $oTargetObj->CheckConsistency();
-		if ($res !== true)
-		{
-			// $res contains the error description
-			$aErrors["GLOBAL"] = Dict::Format('UI:CSVReport-Row-Issue-Inconsistent', $res);
-		}
-		return $aResults;
-	}
-
-	/**
-	 * search with current permissions did not match
-	 * let's search why and give some more feedbacks to the user through proper labels
-	 *
-	 * @param DBObjectSearch $oDbSearchWithConditions search used to find external key
-	 *
-	 * @return \CellStatus_SearchIssue
-	 * @throws \CoreException
-	 * @throws \MissingQueryArgument
-	 * @throws \MySQLException
-	 * @throws \MySQLHasGoneAwayException
-	 *
-	 * @since 3.1.0 N°5305
-	 */
-	protected function GetCellSearchIssue($oDbSearchWithConditions) : CellStatus_SearchIssue {
-		//current search with current permissions did not match
-		//let's search why and give some more feedback to the user
-
-		$sSerializedSearch = $oDbSearchWithConditions->serialize();
-
-		// Count all objects with all permissions without any condition
-		$oDbSearchWithoutAnyCondition = new DBObjectSearch($oDbSearchWithConditions->GetClass());
-		$oDbSearchWithoutAnyCondition->AllowAllData(true);
-		$oExtObjectSet = new CMDBObjectSet($oDbSearchWithoutAnyCondition);
-		$iAllowAllDataObjectCount = $oExtObjectSet->Count();
-
-		if ($iAllowAllDataObjectCount === 0) {
-			$sReason = Dict::Format('UI:CSVReport-Value-NoMatch-NoObject', $oDbSearchWithConditions->GetClass());
-			return new CellStatus_SearchIssue($sSerializedSearch, $sReason);
-		}
-
-		// Count all objects with current user permissions
-		$oDbSearchWithoutAnyCondition->AllowAllData(false);
-		$oExtObjectSetWithCurrentUserPermissions = new CMDBObjectSet($oDbSearchWithoutAnyCondition);
-		$iCurrentUserRightsObjectCount = $oExtObjectSetWithCurrentUserPermissions->Count();
-		$sAllowedValuesOql = $oDbSearchWithoutAnyCondition->serialize();
-
-		if ($iCurrentUserRightsObjectCount === 0){
-			// No objects visible by current user
-			$sReason = Dict::Format('UI:CSVReport-Value-NoMatch-NoObject-ForCurrentUser', $oDbSearchWithConditions->GetClass());
-			return new CellStatus_SearchIssue($sSerializedSearch, $sReason);
-		}
-
-		try{
-			$aDisplayedAllowedValues = [];
-			// Possibles values are displayed to UI user. we have to limit the amount of displayed values
-			$oExtObjectSetWithCurrentUserPermissions->SetLimit(4);
-			for($i = 0; $i < 3; $i++){
-				/** @var DBObject $oVisibleObject */
-				$oVisibleObject = $oExtObjectSetWithCurrentUserPermissions->Fetch();
-				if (is_null($oVisibleObject)){
-					break;
-				}
-
-				$aCurrentAllowedValueFields = [];
-				foreach ($oDbSearchWithConditions->GetInternalParams() as $sForeignAttCode => $sValue){
-					$aCurrentAllowedValueFields[] = $oVisibleObject->Get($sForeignAttCode);
-				}
-				$aDisplayedAllowedValues[] = implode(" ", $aCurrentAllowedValueFields);
-
-			}
-			$allowedValues = implode(", ", $aDisplayedAllowedValues);
-			if ($oExtObjectSetWithCurrentUserPermissions->Count() > 3){
-				$allowedValues .= "...";
-			}
-		} catch(Exception $e) {
-			IssueLog::Error("failure during CSV import when fetching few visible objects: ", null,
-				[ 'target_class' => $oDbSearchWithConditions->GetClass(), 'criteria' => $oDbSearchWithConditions->GetCriteria(), 'message' => $e->getMessage()]
-			);
-			$sReason = Dict::Format('UI:CSVReport-Value-NoMatch-NoObject-ForCurrentUser', $oDbSearchWithConditions->GetClass());
-			return new CellStatus_SearchIssue($sSerializedSearch, $sReason);
-		}
-
-		if ($iAllowAllDataObjectCount != $iCurrentUserRightsObjectCount) {
-			// No match and some objects NOT visible by current user. including current search maybe...
-			$sReason = Dict::Format('UI:CSVReport-Value-NoMatch-SomeObjectNotVisibleForCurrentUser', $oDbSearchWithConditions->GetClass());
-			return new CellStatus_SearchIssue($sSerializedSearch, $sReason, $oDbSearchWithConditions->GetClass(), $allowedValues, $sAllowedValuesOql);
-		}
-
-		// No match. This is not linked to any right issue
-		// Possible values: DD,DD
-		$aCurrentValueFields = [];
-		foreach ($oDbSearchWithConditions->GetInternalParams() as $sValue){
-			$aCurrentValueFields[] = $sValue;
-		}
-		$value =implode(" ", $aCurrentValueFields);
-		$sReason = Dict::Format('UI:CSVReport-Value-NoMatch', $value);
-		return new CellStatus_SearchIssue($sSerializedSearch, $sReason, $oDbSearchWithConditions->GetClass(), $allowedValues, $sAllowedValuesOql);
-	}
-
-	protected function PrepareMissingObject(&$oTargetObj, &$aErrors)
-	{
-		$aResults = array();
-		$aErrors = array();
-
-		// External keys
-		//
-		foreach($this->m_aExtKeys as $sAttCode => $aKeyConfig)
-		{
-			//$oExtKey = MetaModel::GetAttributeDef(get_class($oTargetObj), $sAttCode);
-			$aResults[$sAttCode]= new CellStatus_Void($oTargetObj->Get($sAttCode));
-
-			foreach ($aKeyConfig as $sForeignAttCode => $iCol)
-			{
-				$aResults[$iCol] = new CellStatus_Void('?');
-			}
-		}
-
-		// Update attributes
-		//
-		foreach($this->m_aOnDisappear as $sAttCode => $value)
-		{
-			if (!MetaModel::IsValidAttCode(get_class($oTargetObj), $sAttCode))
-			{
-				throw new BulkChangeException('Invalid attribute code', array('class' => get_class($oTargetObj), 'attcode' => $sAttCode));
-			}
-			$oTargetObj->Set($sAttCode, $value);
-		}
-
-		// Reporting on fields
-		//
-		$aChangedFields = $oTargetObj->ListChanges();
-		foreach ($this->m_aAttList as $sAttCode => $iCol)
-		{
-			if ($sAttCode == 'id')
-			{
-				$aResults[$iCol]= new CellStatus_Void($oTargetObj->GetKey());
-			}
-			if (array_key_exists($sAttCode, $aChangedFields))
-			{
-				$aResults[$iCol]= new CellStatus_Modify($oTargetObj->Get($sAttCode), $oTargetObj->GetOriginal($sAttCode));
-			}
-			else
-			{
-				// By default... nothing happens
-				$aResults[$iCol]= new CellStatus_Void($oTargetObj->Get($sAttCode));
-			}
-		}
-
-		// Checks
-		//
-		$res = $oTargetObj->CheckConsistency();
-		if ($res !== true)
-		{
-			// $res contains the error description
-			$aErrors["GLOBAL"] = Dict::Format('UI:CSVReport-Row-Issue-Inconsistent', $res);
-		}
-		return $aResults;
-	}
-
-
-	protected function CreateObject(&$aResult, $iRow, $aRowData, CMDBChange $oChange = null)
-	{
-		$oTargetObj = MetaModel::NewObject($this->m_sClass);
-
-		// Populate the cache for hierarchical keys (only if in verify mode)
-		if (is_null($oChange))
-		{
-			// 1. determine if a hierarchical key exists
-			foreach($this->m_aExtKeys as $sAttCode => $aKeyConfig)
-			{
-				$oExtKey = MetaModel::GetAttributeDef(get_class($oTargetObj), $sAttCode);
-				if (!$this->IsNullExternalKeySpec($aRowData, $sAttCode) && MetaModel::IsParentClass(get_class($oTargetObj), $this->m_sClass))
-				{
-					// 2. Populate the cache for further checks
-					$aCacheKeys = array();
-					foreach ($aKeyConfig as $sForeignAttCode => $iCol)
-					{
-						// The foreign attribute is one of our reconciliation key
-						if ($sForeignAttCode == 'id')
-						{
-							$value = $aRowData[$iCol];
-						}
-						else
-						{
-							if (!isset($this->m_aAttList[$sForeignAttCode]) || !isset($aRowData[$this->m_aAttList[$sForeignAttCode]]))
-							{
-								// the key is not in the import
-								break 2;
-							}
-							$value = $aRowData[$this->m_aAttList[$sForeignAttCode]];
-						}
-						$aCacheKeys[] = $value;
-					}
-					$sCacheKey = implode('_|_', $aCacheKeys); // Unique key for this query...
-					$this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey] = array(
-						'c' => 1,
-						'k' => -1,
-						'oql' => '',
-						'h' => 0, // number of hits on this cache entry
-					);
-				}
-			}
-		}
-
-		$aResult[$iRow] = $this->PrepareObject($oTargetObj, $aRowData, $aErrors);
-
-		if (count($aErrors) > 0)
-		{
-			$sErrors = implode(', ', $aErrors);
-			$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Attribute'));
-			//__ERRORS__ used by tests only
-			$aResult[$iRow]["__ERRORS__"] = new RowStatus_Error($sErrors);
-			return $oTargetObj;
-		}
-
-		// Check that any external key will have a value proposed
-		$aMissingKeys = array();
-		foreach (MetaModel::GetExternalKeys($this->m_sClass) as $sExtKeyAttCode => $oExtKey)
-		{
-			if (!$oExtKey->IsNullAllowed())
-			{
-				if (!array_key_exists($sExtKeyAttCode, $this->m_aExtKeys) && !array_key_exists($sExtKeyAttCode, $this->m_aAttList))
-				{
-					$aMissingKeys[] = $oExtKey->GetLabel();
-				}
-			}
-		}
-		if (count($aMissingKeys) > 0)
-		{
-			$sMissingKeys = implode(', ', $aMissingKeys);
-			$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::Format('UI:CSVReport-Row-Issue-MissingExtKey', $sMissingKeys));
-			return $oTargetObj;
-		}
-
-		// Optionally record the results
-		//
-		if ($oChange)
-		{
-			$newID = $oTargetObj->DBInsert();
-		}
-		else
-		{
-			$newID = 0;
-		}
-
-		$aResult[$iRow]["__STATUS__"] = new RowStatus_NewObj();
-		$aResult[$iRow]["finalclass"] = get_class($oTargetObj);
-		$aResult[$iRow]["id"] = new CellStatus_Void($newID);
-
-		return $oTargetObj;
-	}
-
-	/**
-	 * @param array $aResult
-	 * @param int $iRow
-	 * @param \CMDBObject $oTargetObj
-	 * @param array $aRowData
-	 * @param \CMDBChange $oChange
-	 *
-	 * @throws \CoreException
-	 * @throws \CoreUnexpectedValue
-	 * @throws \MissingQueryArgument
-	 * @throws \MySQLException
-	 * @throws \MySQLHasGoneAwayException
-	 */
-	protected function UpdateObject(&$aResult, $iRow, $oTargetObj, $aRowData, CMDBChange $oChange = null)
-	{
-		$aResult[$iRow] = $this->PrepareObject($oTargetObj, $aRowData, $aErrors);
-
-		// Reporting
-		//
-		$aResult[$iRow]["finalclass"] = get_class($oTargetObj);
-		$aResult[$iRow]["id"] = new CellStatus_Void($oTargetObj->GetKey());
-
-		if (count($aErrors) > 0)
-		{
-			$sErrors = implode(', ', $aErrors);
-			$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Attribute'));
-			//__ERRORS__ used by tests only
-			$aResult[$iRow]["__ERRORS__"] = new RowStatus_Error($sErrors);
-			return;
-		}
-
-		$aChangedFields = $oTargetObj->ListChanges();
-		if (count($aChangedFields) > 0)
-		{
-			$aResult[$iRow]["__STATUS__"] = new RowStatus_Modify(count($aChangedFields));
-
-			// Optionaly record the results
-			//
-			if ($oChange)
-			{
-				try
-				{
-					$oTargetObj->DBUpdate();
-				}
-				catch(CoreException $e)
-				{
-					$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue($e->getMessage());
-				}
-			}
-		}
-		else
-		{
-			$aResult[$iRow]["__STATUS__"] = new RowStatus_NoChange();
-		}
-	}
-
-	/**
-	 * @param array $aResult
-	 * @param int $iRow
-	 * @param \CMDBObject $oTargetObj
-	 * @param \CMDBChange $oChange
-	 *
-	 * @throws \BulkChangeException
-	 */
-	protected function UpdateMissingObject(&$aResult, $iRow, $oTargetObj, CMDBChange $oChange = null)
-	{
-		$aResult[$iRow] = $this->PrepareMissingObject($oTargetObj, $aErrors);
-
-		// Reporting
-		//
-		$aResult[$iRow]["finalclass"] = get_class($oTargetObj);
-		$aResult[$iRow]["id"] = new CellStatus_Void($oTargetObj->GetKey());
-
-		if (count($aErrors) > 0)
-		{
-			$sErrors = implode(', ', $aErrors);
-			$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Attribute'));
-			//__ERRORS__ used by tests only
-			$aResult[$iRow]["__ERRORS__"] = new RowStatus_Error($sErrors);
-			return;
-		}
-
-		$aChangedFields = $oTargetObj->ListChanges();
-		if (count($aChangedFields) > 0)
-		{
-			$aResult[$iRow]["__STATUS__"] = new RowStatus_Disappeared(count($aChangedFields));
-
-			// Optionaly record the results
-			//
-			if ($oChange)
-			{
-				try
-				{
-					$oTargetObj->DBUpdate();
-				}
-				catch(CoreException $e)
-				{
-					$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue($e->getMessage());
-				}
-			}
-		}
-		else
-		{
-			$aResult[$iRow]["__STATUS__"] = new RowStatus_Disappeared(0);
-		}
-	}
-
-	public function Process(CMDBChange $oChange = null)
-	{
-		if ($oChange)
-		{
-			CMDBObject::SetCurrentChange($oChange);
-		}
-
-		// Note: $oChange can be null, in which case the aim is to check what would be done
-
-		// Debug...
-		//
-		if (false)
-		{
-			echo "<pre>\n";
-			echo "Attributes:\n";
-			print_r($this->m_aAttList);
-			echo "ExtKeys:\n";
-			print_r($this->m_aExtKeys);
-			echo "Reconciliation:\n";
-			print_r($this->m_aReconcilKeys);
-			echo "Synchro scope:\n";
-			print_r($this->m_sSynchroScope);
-			echo "Synchro changes:\n";
-			print_r($this->m_aOnDisappear);
-			//echo "Data:\n";
-			//print_r($this->m_aData);
-			echo "</pre>\n";
-			exit;
-		}
-
-		$aResult = array();
-
-		if (!is_null($this->m_sDateFormat) && (strlen($this->m_sDateFormat) > 0))
-		{
-			$sDateTimeFormat = $this->m_sDateFormat; // the specified format is actually the date AND time format
-			$oDateTimeFormat = new DateTimeFormat($sDateTimeFormat);
-			$sDateFormat = $oDateTimeFormat->ToDateFormat();
-			AttributeDateTime::SetFormat($oDateTimeFormat);
-			AttributeDate::SetFormat(new DateTimeFormat($sDateFormat));
-			// Translate dates from the source data
-			//
-			foreach ($this->m_aAttList as $sAttCode => $iCol)
-			{
-				if ($sAttCode == 'id') continue;
-
-				$oAttDef = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
-				if ($oAttDef instanceof AttributeDateTime) // AttributeDate is derived from AttributeDateTime
-				{
-					foreach($this->m_aData as $iRow => $aRowData)
-					{
-						$sFormat = $sDateTimeFormat;
-						if(!isset($this->m_aData[$iRow][$iCol])){
-							continue;
-						}
-						$sValue = $this->m_aData[$iRow][$iCol];
-						if (!empty($sValue))
-						{
-							if ($oAttDef instanceof AttributeDate)
-							{
-								$sFormat = $sDateFormat;
-							}
-							$oFormat = new DateTimeFormat($sFormat);
-							$sDateExample = $oFormat->Format(new DateTime('2022-10-23 16:25:33'));
-							$sRegExp = $oFormat->ToRegExpr('/');
-							$sErrorMsg = Dict::Format('UI:CSVReport-Row-Issue-ExpectedDateFormat', $sDateExample);
-							if (!preg_match($sRegExp, $sValue))
-							{
-								$aResult[$iRow]["__STATUS__"]= new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-DateFormat'));
-								$aResult[$iRow][$iCol] = new CellStatus_Issue($sValue, null, $sErrorMsg);
-
-							}
-							else
-							{
-								$oDate = DateTime::createFromFormat($sFormat, $sValue);
-								if ($oDate !== false)
-								{
-									$sNewDate = $oDate->format($oAttDef->GetInternalFormat());
-									$this->m_aData[$iRow][$iCol] = $sNewDate;
-								}
-								else
-								{
-									// almost impossible ti reproduce since even incorrect dates with correct formats are formated and $oDate will not be false
-									// Leave the cell unchanged
-									$aResult[$iRow]["__STATUS__"]= new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-DateFormat'));
-									$aResult[$iRow][$iCol] = new CellStatus_Issue($sValue, null, $sErrorMsg);
-								}
-							}
-						}
-						else
-						{
-							$this->m_aData[$iRow][$iCol] = '';
-						}
-					}
-				}
-			}
-		}
-
-		// Compute the results
-		//
-		if (!is_null($this->m_sSynchroScope))
-		{
-			$aVisited = array();
-		}
-		$iPreviousTimeLimit = ini_get('max_execution_time');
-		$iLoopTimeLimit = MetaModel::GetConfig()->Get('max_execution_time_per_loop');
-
-		// Avoid too many events
-		cmdbAbstractObject::SetEventDBLinksChangedBlocked(true);
-		try {
-			foreach ($this->m_aData as $iRow => $aRowData) {
-				set_time_limit(intval($iLoopTimeLimit));
-				// Stop if not the good number of cols in $aRowData
-				if($this->m_iNbCol>0 && count($aRowData) != $this->m_iNbCol){
-					$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::Format('UI:CSVReport-Row-Issue-NbField',count($aRowData),$this->m_iNbCol) );
-					continue;
-				}
-
-				if (isset($aResult[$iRow]["__STATUS__"])) {
-					// An issue at the earlier steps - skip the rest
-					continue;
-				}
-				try {
-					$oReconciliationFilter = new DBObjectSearch($this->m_sClass);
-					$bSkipQuery = false;
-					foreach ($this->m_aReconcilKeys as $sAttCode) {
-						$valuecondition = null;
-						if (array_key_exists($sAttCode, $this->m_aExtKeys)) {
-							if ($this->IsNullExternalKeySpec($aRowData, $sAttCode)) {
-								$oExtKey = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
-								if ($oExtKey->IsNullAllowed()) {
-									$valuecondition = $oExtKey->GetNullValue();
-									$aResult[$iRow][$sAttCode] = new CellStatus_Void($oExtKey->GetNullValue());
-								} else {
-									$aResult[$iRow][$sAttCode] = new CellStatus_NullIssue();
-								}
-							} else {
-								// The value has to be found or verified
-
-								/** var DBObjectSearch $oReconFilter */
-								list($oReconFilter, $aMatches) = $this->ResolveExternalKey($aRowData, $sAttCode, $aResult[$iRow]);
-
-								if (count($aMatches) == 1) {
-									$oRemoteObj = reset($aMatches); // first item
-									$valuecondition = $oRemoteObj->GetKey();
-									$aResult[$iRow][$sAttCode] = new CellStatus_Void($oRemoteObj->GetKey());
-								} elseif (count($aMatches) == 0) {
-									$oCellStatus_SearchIssue = $this->GetCellSearchIssue($oReconFilter);
-									$aResult[$iRow][$sAttCode] = $oCellStatus_SearchIssue;
-								} else {
-									$aResult[$iRow][$sAttCode] = new CellStatus_Ambiguous(null, count($aMatches), $oReconFilter->serialize());
-								}
-							}
-						} else {
-							// The value is given in the data row
-							$iCol = $this->m_aAttList[$sAttCode];
-							if ($sAttCode == 'id') {
-								$valuecondition = $aRowData[$iCol];
-							} else {
-								$oAttDef = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
-								$valuecondition = $oAttDef->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
-							}
-						}
-						if (is_null($valuecondition)) {
-							$bSkipQuery = true;
-						} else {
-							$oReconciliationFilter->AddCondition($sAttCode, $valuecondition, '=', true);
-						}
-					}
-					if ($bSkipQuery) {
-						$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Reconciliation'));
-					} else {
-						$oReconciliationSet = new CMDBObjectSet($oReconciliationFilter);
-						switch ($oReconciliationSet->Count()) {
-							case 0:
-								$oTargetObj = $this->CreateObject($aResult, $iRow, $aRowData, $oChange);
-								// $aResult[$iRow]["__STATUS__"]=> set in CreateObject
-								$aVisited[] = $oTargetObj->GetKey();
-								break;
-							case 1:
-								$oTargetObj = $oReconciliationSet->Fetch();
-								$this->UpdateObject($aResult, $iRow, $oTargetObj, $aRowData, $oChange);
-								// $aResult[$iRow]["__STATUS__"]=> set in UpdateObject
-								if (!is_null($this->m_sSynchroScope)) {
-									$aVisited[] = $oTargetObj->GetKey();
-								}
-								break;
-							default:
-								// Found several matches, ambiguous
-								$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Ambiguous'));
-								$aResult[$iRow]["id"] = new CellStatus_Ambiguous(0, $oReconciliationSet->Count(), $oReconciliationFilter->serialize());
-								$aResult[$iRow]["finalclass"] = 'n/a';
-						}
-					}
-				} catch (Exception $e) {
-					$aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::Format('UI:CSVReport-Row-Issue-Internal', get_class($e), $e->getMessage()));
-				}
-			}
-
-			if (!is_null($this->m_sSynchroScope)) {
-				// Compute the delta between the scope and visited objects
-				$oScopeSearch = DBObjectSearch::FromOQL($this->m_sSynchroScope);
-				$oScopeSet = new DBObjectSet($oScopeSearch);
-				while ($oObj = $oScopeSet->Fetch()) {
-					$iObj = $oObj->GetKey();
-					if (!in_array($iObj, $aVisited)) {
-						set_time_limit(intval($iLoopTimeLimit));
-						$iRow++;
-						$this->UpdateMissingObject($aResult, $iRow, $oObj, $oChange);
-					}
-				}
-			}
-		} finally {
-			// Send all the retained events for further computations
-			cmdbAbstractObject::SetEventDBLinksChangedBlocked(false);
-			cmdbAbstractObject::FireEventDbLinksChangedForAllObjects();
-		}
-
-		set_time_limit(intval($iPreviousTimeLimit));
-
-		// Fill in the blanks - the result matrix is expected to be 100% complete
-		//
-		foreach($this->m_aData as $iRow => $aRowData)
-		{
-			foreach($this->m_aAttList as $iCol)
-			{
-				if (!array_key_exists($iCol, $aResult[$iRow]))
-				{
-					if(isset($aRowData[$iCol])) {
-						$aResult[$iRow][$iCol] = new CellStatus_Void($aRowData[$iCol]);
-					} else {
-						$aResult[$iRow][$iCol] = new CellStatus_Issue('', null, Dict::S('UI:CSVReport-Value-Issue-NoValue'));
-					}
-				}
-			}
-			foreach($this->m_aExtKeys as $sAttCode => $aForeignAtts)
-			{
-				if (!array_key_exists($sAttCode, $aResult[$iRow]))
-				{
-					$aResult[$iRow][$sAttCode] = new CellStatus_Void('n/a');
-				}
-				foreach ($aForeignAtts as $sForeignAttCode => $iCol)
-				{
-					if (!array_key_exists($iCol, $aResult[$iRow]))
-					{
-						// The foreign attribute is one of our reconciliation key
-						if(isset($aRowData[$iCol])) {
-							$aResult[$iRow][$iCol] = new CellStatus_Void($aRowData[$iCol]);
-						} else {
-							$aResult[$iRow][$iCol] = new CellStatus_Issue('', null, 'UI:CSVReport-Value-Issue-NoValue');
-						}
-					}
-				}
-			}
-		}
-
-		return $aResult;
-	}
-
-	/**
-	 * Display the history of bulk imports
-	 */
-	static function DisplayImportHistory(WebPage $oPage, $bFromAjax = false, $bShowAll = false)
-	{
-		$sAjaxDivId = "CSVImportHistory";
-		if (!$bFromAjax)
-		{
-			$oPage->add('<div id="'.$sAjaxDivId.'">');
-		}
-
-		$oPage->p(Dict::S('UI:History:BulkImports+').' <span id="csv_history_reload"></span>');
-
-		$oBulkChangeSearch = DBObjectSearch::FromOQL("SELECT CMDBChange WHERE origin IN ('csv-interactive', 'csv-import.php')");
-
-		$iQueryLimit = $bShowAll ? 0 : appUserPreferences::GetPref('default_page_size', MetaModel::GetConfig()->GetMinDisplayLimit());
-		$oBulkChanges = new DBObjectSet($oBulkChangeSearch, array('date' => false), array(), null, $iQueryLimit);
-
-		$oAppContext = new ApplicationContext();
-
-		$bLimitExceeded = false;
-		if ($oBulkChanges->Count() > (appUserPreferences::GetPref('default_page_size', MetaModel::GetConfig()->GetMinDisplayLimit())))
-		{
-			$bLimitExceeded = true;
-			if (!$bShowAll)
-			{
-				$iMaxObjects = appUserPreferences::GetPref('default_page_size', MetaModel::GetConfig()->GetMinDisplayLimit());
-				$oBulkChanges->SetLimit($iMaxObjects);
-			}
-		}
-		$oBulkChanges->Seek(0);
-
-		$aDetails = array();
-		while ($oChange = $oBulkChanges->Fetch())
-		{
-			$sDate = '<a href="csvimport.php?step=10&changeid='.$oChange->GetKey().$oAppContext->GetForLink(true).'">'.$oChange->Get('date').'</a>';
-			$sUser = $oChange->GetUserName();
-			if (preg_match('/^(.*)\\(CSV\\)$/i', $oChange->Get('userinfo'), $aMatches))
-			{
-				$sUser = $aMatches[1];
-			}
-			else
-			{
-				$sUser = $oChange->Get('userinfo');
-			}
-
-			$oOpSearch = DBObjectSearch::FromOQL("SELECT CMDBChangeOpCreate WHERE change = :change_id");
-			$oOpSet = new DBObjectSet($oOpSearch, array(), array('change_id' => $oChange->GetKey()));
-			$iCreated = $oOpSet->Count();
-
-			// Get the class from the first item found (assumption: a CSV load is done for a single class)
-			if ($oCreateOp = $oOpSet->Fetch())
-			{
-				$sClass = $oCreateOp->Get('objclass');
-			}
-
-			$oOpSearch = DBObjectSearch::FromOQL("SELECT CMDBChangeOpSetAttribute WHERE change = :change_id");
-			$oOpSet = new DBObjectSet($oOpSearch, array(), array('change_id' => $oChange->GetKey()));
-
-			$aModified = array();
-			$aAttList = array();
-			while ($oModified = $oOpSet->Fetch())
-			{
-				// Get the class (if not done earlier on object creation)
-				$sClass = $oModified->Get('objclass');
-				$iKey = $oModified->Get('objkey');
-				$sAttCode = $oModified->Get('attcode');
-
-				$aAttList[$sClass][$sAttCode] = true;
-				$aModified["$sClass::$iKey"] = true;
-			}
-			$iModified = count($aModified);
-
-			// Assumption: there is only one class of objects being loaded
-			// Then the last class found gives us the class for every object
-			if ( ($iModified > 0) || ($iCreated > 0))
-			{
-				$aDetails[] = array('date' => $sDate, 'user' => $sUser, 'class' => $sClass, 'created' => $iCreated, 'modified' => $iModified);
-			}
-		}
-
-		$aConfig = array( 'date' => array('label' => Dict::S('UI:History:Date'), 'description' => Dict::S('UI:History:Date+')),
-					'user' => array('label' => Dict::S('UI:History:User'), 'description' => Dict::S('UI:History:User+')),
-					'class' => array('label' => Dict::S('Core:AttributeClass'), 'description' => Dict::S('Core:AttributeClass+')),
-					'created' => array('label' => Dict::S('UI:History:StatsCreations'), 'description' => Dict::S('UI:History:StatsCreations+')),
-					'modified' => array('label' => Dict::S('UI:History:StatsModifs'), 'description' => Dict::S('UI:History:StatsModifs+')),
-		);
-
-		if ($bLimitExceeded)
-		{
-			if ($bShowAll)
-			{
-				// Collapsible list
-				$oPage->add('<p>'.Dict::Format('UI:CountOfResults', $oBulkChanges->Count()).'&nbsp;&nbsp;<a class="truncated" onclick="OnTruncatedHistoryToggle(false);">'.Dict::S('UI:CollapseList').'</a></p>');
-			}
-			else
-			{
-				// Truncated list
-				$iMinDisplayLimit = appUserPreferences::GetPref('default_page_size', MetaModel::GetConfig()->GetMinDisplayLimit());
-				$sCollapsedLabel = Dict::Format('UI:TruncatedResults', $iMinDisplayLimit, $oBulkChanges->Count());
-				$sLinkLabel = Dict::S('UI:DisplayAll');
-				$oPage->add('<p>'.$sCollapsedLabel.'&nbsp;&nbsp;<a class="truncated" onclick="OnTruncatedHistoryToggle(true);">'.$sLinkLabel.'</p>');
-
-				$oPage->add_ready_script(
-					<<<EOF
-	$('#$sAjaxDivId table.listResults').addClass('truncated');
-	$('#$sAjaxDivId table.listResults tr:last td').addClass('truncated');
-EOF
-				);
-
-
-				$sAppContext = $oAppContext->GetForLink();
-				$oPage->add_script(
-					<<<EOF
-	function OnTruncatedHistoryToggle(bShowAll)
-	{
-		$('#csv_history_reload').html('<img src="' + GetAbsoluteUrlAppRoot() + 'images/indicator.gif"/>');
-		$.get(GetAbsoluteUrlAppRoot()+'pages/ajax.render.php?$sAppContext', {operation: 'displayCSVHistory', showall: bShowAll}, function(data)
-			{
-				$('#$sAjaxDivId').html(data);
-			}
-		);
-	}
-EOF
-				);
-			}
-		}
-		else
-		{
-			// Normal display - full list without any decoration
-		}
-
-		$oPage->table($aConfig, $aDetails);
-
-		if (!$bFromAjax)
-		{
-			$oPage->add('</div>');
-		}
-	}
-
-	/**
-	 * Display the details of an import
-	 * @param iTopWebPage $oPage
-	 * @param $iChange
-	 * @throws Exception
-	 */
-	static function DisplayImportHistoryDetails(iTopWebPage $oPage, $iChange)
-	{
-		if ($iChange == 0)
-		{
-			throw new Exception("Missing parameter changeid");
-		}
-		$oChange = MetaModel::GetObject('CMDBChange', $iChange, false);
-		if (is_null($oChange))
-		{
-			throw new Exception("Unknown change: $iChange");
-		}
-		$oPage->add("<div><p><h1>".Dict::Format('UI:History:BulkImportDetails', $oChange->Get('date'), $oChange->GetUserName())."</h1></p></div>\n");
-
-		// Assumption : change made one single class of objects
-		$aObjects = array();
-		$aAttributes = array(); // array of attcode => occurences
-
-		$oOpSearch = DBObjectSearch::FromOQL("SELECT CMDBChangeOp WHERE change = :change_id");
-		$oOpSet = new DBObjectSet($oOpSearch, array(), array('change_id' => $iChange));
-		while ($oOperation = $oOpSet->Fetch())
-		{
-			$sClass = $oOperation->Get('objclass');
-			$iKey = $oOperation->Get('objkey');
-			$iObjId = "$sClass::$iKey";
-			if (!isset($aObjects[$iObjId]))
-			{
-				$aObjects[$iObjId] = array();
-				$aObjects[$iObjId]['__class__'] = $sClass;
-				$aObjects[$iObjId]['__id__'] = $iKey;
-			}
-			if (get_class($oOperation) == 'CMDBChangeOpCreate')
-			{
-				$aObjects[$iObjId]['__created__'] = true;
-			}
-			elseif ($oOperation instanceof CMDBChangeOpSetAttribute)
-			{
-				$sAttCode = $oOperation->Get('attcode');
-
-				if ((get_class($oOperation) == 'CMDBChangeOpSetAttributeScalar') || (get_class($oOperation) == 'CMDBChangeOpSetAttributeURL'))
-				{
-					$oAttDef = MetaModel::GetAttributeDef($sClass, $sAttCode);
-					if ($oAttDef->IsExternalKey())
-					{
-						$sOldValue = Dict::S('UI:UndefinedObject');
-						if ($oOperation->Get('oldvalue') != 0)
-						{
-							$oOldTarget = MetaModel::GetObject($oAttDef->GetTargetClass(), $oOperation->Get('oldvalue'));
-							$sOldValue = $oOldTarget->GetHyperlink();
-						}
-
-						$sNewValue = Dict::S('UI:UndefinedObject');
-						if ($oOperation->Get('newvalue') != 0)
-						{
-							$oNewTarget = MetaModel::GetObject($oAttDef->GetTargetClass(), $oOperation->Get('newvalue'));
-							$sNewValue = $oNewTarget->GetHyperlink();
-						}
-					}
-					else
-					{
-						$sOldValue = $oOperation->GetAsHTML('oldvalue');
-						$sNewValue = $oOperation->GetAsHTML('newvalue');
-					}
-					$aObjects[$iObjId][$sAttCode] = $sOldValue.' -&gt; '.$sNewValue;
-				}
-				else
-				{
-					$aObjects[$iObjId][$sAttCode] = 'n/a';
-				}
-
-				if (isset($aAttributes[$sAttCode]))
-				{
-					$aAttributes[$sAttCode]++;
-				}
-				else
-				{
-					$aAttributes[$sAttCode] = 1;
-				}
-			}
-		}
-
-		$aDetails = array();
-		foreach($aObjects as $iUId => $aObjData)
-		{
-			$aRow = array();
-			$oObject = MetaModel::GetObject($aObjData['__class__'], $aObjData['__id__'], false);
-			if (is_null($oObject))
-			{
-				$aRow['object'] = $aObjData['__class__'].'::'.$aObjData['__id__'].' (deleted)';
-			}
-			else
-			{
-				$aRow['object'] = $oObject->GetHyperlink();
-			}
-			if (isset($aObjData['__created__']))
-			{
-				$aRow['operation'] = Dict::S('Change:ObjectCreated');
-			}
-			else
-			{
-				$aRow['operation'] = Dict::S('Change:ObjectModified');
-			}
-			foreach ($aAttributes as $sAttCode => $iOccurences)
-			{
-				if (isset($aObjData[$sAttCode]))
-				{
-					$aRow[$sAttCode] = $aObjData[$sAttCode];
-				}
-				elseif (!is_null($oObject))
-				{
-					// This is the current vaslue: $oObject->GetAsHtml($sAttCode)
-					// whereas we are displaying the value that was set at the time
-					// the object was created
-					// This requires addtional coding...let's do that later
-					$aRow[$sAttCode] = '';
-				}
-				else
-				{
-					$aRow[$sAttCode] = '';
-				}
-			}
-			$aDetails[] = $aRow;
-		}
-
-		$aConfig = array();
-		$aConfig['object'] = array('label' => MetaModel::GetName($sClass), 'description' => MetaModel::GetClassDescription($sClass));
-		$aConfig['operation'] = array('label' => Dict::S('UI:History:Changes'), 'description' => Dict::S('UI:History:Changes+'));
-		foreach ($aAttributes as $sAttCode => $iOccurences)
-		{
-			$aConfig[$sAttCode] = array('label' => MetaModel::GetLabel($sClass, $sAttCode), 'description' => MetaModel::GetDescription($sClass, $sAttCode));
-		}
-		$oPage->table($aConfig, $aDetails);
-	}
-}
-
diff --git a/core/bulkchange/BulkChange.php b/core/bulkchange/BulkChange.php
new file mode 100644
index 000000000..31cc2d648
--- /dev/null
+++ b/core/bulkchange/BulkChange.php
@@ -0,0 +1,1074 @@
+<?php
+
+/**
+ * BulkChange
+ * Interpret a given data set and update the DB accordingly (fake mode avail.)
+ *
+ * @package iTopORM
+ */
+class BulkChange
+{
+    /** @var string */
+    protected $m_sClass;
+    protected $m_aData; // Note: hereafter, iCol maybe actually be any acceptable key (string)
+    // #@# todo: rename the variables to sColIndex
+    /** @var array<string, string> attcode as key, iCol as value */
+    protected $m_aAttList;
+    /** @var array<string, array<string, string>> sExtKeyAttCode as key, array of sExtReconcKeyAttCode/iCol as value */
+    protected $m_aExtKeys;
+    /** @var string[] list of attcode (attcode = 'id' for the pkey) */
+    protected $m_aReconcilKeys;
+    /** @var string OQL - if specified, then the missing items will be reported */
+    protected $m_sSynchroScope;
+    /**
+     * @var array<string, mixed> attcode as key, attvalue as value. Values to be set when an object gets out of scope
+     *                          (ignored if no scope has been defined)
+     */
+    protected $m_aOnDisappear;
+    /**
+     * @see DateTime::createFromFormat
+     * @var string Date format specification
+     */
+    protected $m_sDateFormat;
+    /**
+     * @see AttributeEnum
+     * @var boolean true if Values in the data set are localized
+     */
+    protected $m_bLocalizedValues;
+    /** @var array Cache for resolving external keys based on the given search criterias */
+    protected $m_aExtKeysMappingCache;
+    /** @var int number of columns */
+    protected $m_iNbCol;
+
+    public function __construct($sClass, $aData, $aAttList, $aExtKeys, $aReconcilKeys, $sSynchroScope = null, $aOnDisappear = null, $sDateFormat = null, $bLocalize = false, $iNbCol = 0)
+    {
+        $this->m_sClass = $sClass;
+        $this->m_aData = $aData;
+        $this->m_aAttList = $aAttList;
+        $this->m_aReconcilKeys = $aReconcilKeys;
+        $this->m_aExtKeys = $aExtKeys;
+        $this->m_sSynchroScope = $sSynchroScope;
+        $this->m_aOnDisappear = $aOnDisappear;
+        $this->m_sDateFormat = $sDateFormat;
+        $this->m_bLocalizedValues = $bLocalize;
+        $this->m_aExtKeysMappingCache = array();
+        $this->m_iNbCol = $iNbCol;
+    }
+
+    protected function ResolveExternalKey($aRowData, $sAttCode, &$aResults)
+    {
+        $oExtKey = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
+        $oReconFilter = new DBObjectSearch($oExtKey->GetTargetClass());
+        foreach ($this->m_aExtKeys[$sAttCode] as $sReconKeyAttCode => $iCol) {
+            if ($sReconKeyAttCode == 'id') {
+                $value = (int)$aRowData[$iCol];
+            } else {
+                // The foreign attribute is one of our reconciliation key
+                $oForeignAtt = MetaModel::GetAttributeDef($oExtKey->GetTargetClass(), $sReconKeyAttCode);
+                $value = $oForeignAtt->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
+            }
+            $oReconFilter->AddCondition($sReconKeyAttCode, $value, '=');
+            $aResults[$iCol] = new CellStatus_Void($aRowData[$iCol]);
+        }
+
+        $oExtObjects = new CMDBObjectSet($oReconFilter);
+        $aKeys = $oExtObjects->ToArray();
+        return array($oReconFilter, $aKeys);
+    }
+
+    // Returns true if the CSV data specifies that the external key must be left undefined
+    protected function IsNullExternalKeySpec($aRowData, $sAttCode)
+    {
+        //$oExtKey = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
+        foreach ($this->m_aExtKeys[$sAttCode] as $sForeignAttCode => $iCol) {
+            // The foreign attribute is one of our reconciliation key
+            if (isset($aRowData[$iCol]) && strlen($aRowData[$iCol]) > 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * @param DBObject $oTargetObj
+     * @param array $aRowData
+     * @param array $aErrors
+     *
+     * @return array
+     * @throws \CoreException
+     * @throws \CoreUnexpectedValue
+     * @throws \MissingQueryArgument
+     * @throws \MySQLException
+     * @throws \MySQLHasGoneAwayException
+     */
+    protected function PrepareObject(&$oTargetObj, $aRowData, &$aErrors)
+    {
+        $aResults = array();
+        $aErrors = array();
+
+        // External keys reconciliation
+        //
+        foreach ($this->m_aExtKeys as $sAttCode => $aReconKeys) {
+            // Skip external keys used for the reconciliation process
+            // if (!array_key_exists($sAttCode, $this->m_aAttList)) continue;
+
+            $oExtKey = MetaModel::GetAttributeDef(get_class($oTargetObj), $sAttCode);
+
+            if ($this->IsNullExternalKeySpec($aRowData, $sAttCode)) {
+                foreach ($aReconKeys as $sReconKeyAttCode => $iCol) {
+                    // Default reporting
+                    // $aRowData[$iCol] is always null
+                    $aResults[$iCol] = new CellStatus_Void($aRowData[$iCol]);
+                }
+                if ($oExtKey->IsNullAllowed()) {
+                    $oTargetObj->Set($sAttCode, $oExtKey->GetNullValue());
+                    $aResults[$sAttCode] = new CellStatus_Void($oExtKey->GetNullValue());
+                } else {
+                    $aErrors[$sAttCode] = Dict::S('UI:CSVReport-Value-Issue-Null');
+                    $aResults[$sAttCode] = new CellStatus_Issue(null, $oTargetObj->Get($sAttCode), Dict::S('UI:CSVReport-Value-Issue-Null'));
+                }
+            } else {
+                $oReconFilter = new DBObjectSearch($oExtKey->GetTargetClass());
+
+                $aCacheKeys = array();
+                foreach ($aReconKeys as $sReconKeyAttCode => $iCol) {
+                    // The foreign attribute is one of our reconciliation key
+                    if ($sReconKeyAttCode == 'id') {
+                        $value = $aRowData[$iCol];
+                    } else {
+                        $oForeignAtt = MetaModel::GetAttributeDef($oExtKey->GetTargetClass(), $sReconKeyAttCode);
+                        $value = $oForeignAtt->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
+                    }
+                    $aCacheKeys[] = $value;
+                    $oReconFilter->AddCondition($sReconKeyAttCode, $value, '=');
+                    $aResults[$iCol] = new CellStatus_Void($aRowData[$iCol]);
+                }
+                $sCacheKey = implode('_|_', $aCacheKeys); // Unique key for this query...
+                $iForeignKey = null;
+                // TODO: check if *too long* keys can lead to collisions... and skip the cache in such a case...
+                if (!array_key_exists($sAttCode, $this->m_aExtKeysMappingCache)) {
+                    $this->m_aExtKeysMappingCache[$sAttCode] = array();
+                }
+                if (array_key_exists($sCacheKey, $this->m_aExtKeysMappingCache[$sAttCode])) {
+                    // Cache hit
+                    $iObjectFoundCount = $this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey]['c'];
+                    $iForeignKey = $this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey]['k'];
+                    // Record the hit
+                    $this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey]['h']++;
+                } else {
+                    // Cache miss, let's initialize it
+                    $oExtObjects = new CMDBObjectSet($oReconFilter);
+                    $iObjectFoundCount = $oExtObjects->Count();
+                    if ($iObjectFoundCount == 1) {
+                        $oForeignObj = $oExtObjects->Fetch();
+                        $iForeignKey = $oForeignObj->GetKey();
+                    }
+                    $this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey] = array(
+                        'c' => $iObjectFoundCount,
+                        'k' => $iForeignKey,
+                        'oql' => $oReconFilter->ToOql(),
+                        'h' => 0, // number of hits on this cache entry
+                    );
+                }
+                switch ($iObjectFoundCount) {
+                    case 0:
+                        $oCellStatus_SearchIssue = $this->GetCellSearchIssue($oReconFilter);
+                        $aResults[$sAttCode] = $oCellStatus_SearchIssue;
+                        $aErrors[$sAttCode] = Dict::S('UI:CSVReport-Value-Issue-NotFound');
+                        break;
+
+                    case 1:
+                        // Do change the external key attribute
+                        $oTargetObj->Set($sAttCode, $iForeignKey);
+                        break;
+
+                    default:
+                        $aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-FoundMany', $iObjectFoundCount);
+                        $aResults[$sAttCode] = new CellStatus_Ambiguous($oTargetObj->Get($sAttCode), $iObjectFoundCount, $oReconFilter->serialize());
+                }
+            }
+
+            // Report
+            if (!array_key_exists($sAttCode, $aResults)) {
+                $iForeignObj = $oTargetObj->Get($sAttCode);
+                if (array_key_exists($sAttCode, $oTargetObj->ListChanges())) {
+                    if ($oTargetObj->IsNew()) {
+                        $aResults[$sAttCode] = new CellStatus_Void($iForeignObj);
+                    } else {
+                        $aResults[$sAttCode] = new CellStatus_Modify($iForeignObj, $oTargetObj->GetOriginal($sAttCode));
+                        foreach ($aReconKeys as $sReconKeyAttCode => $iCol) {
+                            // Report the change on reconciliation values as well
+                            $aResults[$iCol] = new CellStatus_Modify($aRowData[$iCol]);
+                        }
+                    }
+                } else {
+                    $aResults[$sAttCode] = new CellStatus_Void($iForeignObj);
+                }
+            }
+        }
+
+        // Set the object attributes
+        //
+        foreach ($this->m_aAttList as $sAttCode => $iCol) {
+            // skip the private key, if any
+            if (($sAttCode == 'id') || ($sAttCode == 'friendlyname')) {
+                continue;
+            }
+
+            $oAttDef = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
+
+            // skip reconciliation keys
+            if (!$oAttDef->IsWritable() && in_array($sAttCode, $this->m_aReconcilKeys)) {
+                continue;
+            }
+
+            $aReasons = array();
+            $iFlags = ($oTargetObj->IsNew())
+                ? $oTargetObj->GetInitialStateAttributeFlags($sAttCode, $aReasons)
+                : $oTargetObj->GetAttributeFlags($sAttCode, $aReasons);
+            if ((($iFlags & OPT_ATT_READONLY) == OPT_ATT_READONLY) && ($oTargetObj->Get($sAttCode) != $oAttDef->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues))) {
+                $aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-Readonly', $sAttCode, $oTargetObj->Get($sAttCode), $aRowData[$iCol]);
+            } else if ($oAttDef->IsLinkSet() && $oAttDef->IsIndirect()) {
+                try {
+                    $oSet = $oAttDef->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
+                    $oTargetObj->Set($sAttCode, $oSet);
+                } catch (CoreException $e) {
+                    $aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-Format', $e->getMessage());
+                }
+            } else {
+                $value = $oAttDef->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
+                if (is_null($value) && (strlen($aRowData[$iCol]) > 0)) {
+                    if ($oAttDef instanceof AttributeEnum || $oAttDef instanceof AttributeTagSet) {
+                        /** @var AttributeDefinition $oAttributeDefinition */
+                        $oAttributeDefinition = $oAttDef;
+                        $aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-AllowedValues', $sAttCode, implode(',', $oAttributeDefinition->GetAllowedValues()));
+                    } else {
+                        $aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-NoMatch', $sAttCode);
+                    }
+                } else {
+                    $res = $oTargetObj->CheckValue($sAttCode, $value);
+                    if ($res === true) {
+                        $oTargetObj->Set($sAttCode, $value);
+                    } else {
+                        // $res is a string with the error description
+                        $aErrors[$sAttCode] = Dict::Format('UI:CSVReport-Value-Issue-Unknown', $sAttCode, $res);
+                    }
+                }
+            }
+        }
+
+        // Reporting on fields
+        //
+        $aChangedFields = $oTargetObj->ListChanges();
+        foreach ($this->m_aAttList as $sAttCode => $iCol) {
+            if ($sAttCode == 'id') {
+                $aResults[$iCol] = new CellStatus_Void($aRowData[$iCol]);
+            } else {
+                $sCurValue = new ReportValue($oTargetObj, $sAttCode, false);
+                $sOrigValue = new ReportValue($oTargetObj, $sAttCode, true);
+                if (isset($aErrors[$sAttCode])) {
+                    $aResults[$iCol] = new CellStatus_Issue($aRowData[$iCol], $sOrigValue, $aErrors[$sAttCode]);
+                } elseif (array_key_exists($sAttCode, $aChangedFields)) {
+                    if ($oTargetObj->IsNew()) {
+                        $aResults[$iCol] = new CellStatus_Void($sCurValue);
+                    } else {
+                        $aResults[$iCol] = new CellStatus_Modify($sCurValue, $sOrigValue);
+                    }
+                } else {
+                    // By default... nothing happens
+                    $oAttDef = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
+                    if ($oAttDef instanceof AttributeDateTime) {
+                        $aResults[$iCol] = new CellStatus_Void($oAttDef->GetFormat()->Format($aRowData[$iCol]));
+                    } else {
+                        $aResults[$iCol] = new CellStatus_Void($aRowData[$iCol]);
+                    }
+                }
+            }
+        }
+
+        // Checks
+        //
+        $res = $oTargetObj->CheckConsistency();
+        if ($res !== true) {
+            // $res contains the error description
+            $aErrors["GLOBAL"] = Dict::Format('UI:CSVReport-Row-Issue-Inconsistent', $res);
+        }
+        return $aResults;
+    }
+
+    /**
+     * search with current permissions did not match
+     * let's search why and give some more feedbacks to the user through proper labels
+     *
+     * @param DBObjectSearch $oDbSearchWithConditions search used to find external key
+     *
+     * @return \CellStatus_SearchIssue
+     * @throws \CoreException
+     * @throws \MissingQueryArgument
+     * @throws \MySQLException
+     * @throws \MySQLHasGoneAwayException
+     *
+     * @since 3.1.0 N°5305
+     */
+    protected function GetCellSearchIssue($oDbSearchWithConditions): CellStatus_SearchIssue
+    {
+        //current search with current permissions did not match
+        //let's search why and give some more feedback to the user
+
+        $sSerializedSearch = $oDbSearchWithConditions->serialize();
+
+        // Count all objects with all permissions without any condition
+        $oDbSearchWithoutAnyCondition = new DBObjectSearch($oDbSearchWithConditions->GetClass());
+        $oDbSearchWithoutAnyCondition->AllowAllData(true);
+        $oExtObjectSet = new CMDBObjectSet($oDbSearchWithoutAnyCondition);
+        $iAllowAllDataObjectCount = $oExtObjectSet->Count();
+
+        if ($iAllowAllDataObjectCount === 0) {
+            $sReason = Dict::Format('UI:CSVReport-Value-NoMatch-NoObject', $oDbSearchWithConditions->GetClass());
+            return new CellStatus_SearchIssue($sSerializedSearch, $sReason);
+        }
+
+        // Count all objects with current user permissions
+        $oDbSearchWithoutAnyCondition->AllowAllData(false);
+        $oExtObjectSetWithCurrentUserPermissions = new CMDBObjectSet($oDbSearchWithoutAnyCondition);
+        $iCurrentUserRightsObjectCount = $oExtObjectSetWithCurrentUserPermissions->Count();
+        $sAllowedValuesOql = $oDbSearchWithoutAnyCondition->serialize();
+
+        if ($iCurrentUserRightsObjectCount === 0) {
+            // No objects visible by current user
+            $sReason = Dict::Format('UI:CSVReport-Value-NoMatch-NoObject-ForCurrentUser', $oDbSearchWithConditions->GetClass());
+            return new CellStatus_SearchIssue($sSerializedSearch, $sReason);
+        }
+
+        try {
+            $aDisplayedAllowedValues = [];
+            // Possibles values are displayed to UI user. we have to limit the amount of displayed values
+            $oExtObjectSetWithCurrentUserPermissions->SetLimit(4);
+            for ($i = 0; $i < 3; $i++) {
+                /** @var DBObject $oVisibleObject */
+                $oVisibleObject = $oExtObjectSetWithCurrentUserPermissions->Fetch();
+                if (is_null($oVisibleObject)) {
+                    break;
+                }
+
+                $aCurrentAllowedValueFields = [];
+                foreach ($oDbSearchWithConditions->GetInternalParams() as $sForeignAttCode => $sValue) {
+                    $aCurrentAllowedValueFields[] = $oVisibleObject->Get($sForeignAttCode);
+                }
+                $aDisplayedAllowedValues[] = implode(" ", $aCurrentAllowedValueFields);
+
+            }
+            $allowedValues = implode(", ", $aDisplayedAllowedValues);
+            if ($oExtObjectSetWithCurrentUserPermissions->Count() > 3) {
+                $allowedValues .= "...";
+            }
+        } catch (Exception $e) {
+            IssueLog::Error("failure during CSV import when fetching few visible objects: ", null,
+                ['target_class' => $oDbSearchWithConditions->GetClass(), 'criteria' => $oDbSearchWithConditions->GetCriteria(), 'message' => $e->getMessage()]
+            );
+            $sReason = Dict::Format('UI:CSVReport-Value-NoMatch-NoObject-ForCurrentUser', $oDbSearchWithConditions->GetClass());
+            return new CellStatus_SearchIssue($sSerializedSearch, $sReason);
+        }
+
+        if ($iAllowAllDataObjectCount != $iCurrentUserRightsObjectCount) {
+            // No match and some objects NOT visible by current user. including current search maybe...
+            $sReason = Dict::Format('UI:CSVReport-Value-NoMatch-SomeObjectNotVisibleForCurrentUser', $oDbSearchWithConditions->GetClass());
+            return new CellStatus_SearchIssue($sSerializedSearch, $sReason, $oDbSearchWithConditions->GetClass(), $allowedValues, $sAllowedValuesOql);
+        }
+
+        // No match. This is not linked to any right issue
+        // Possible values: DD,DD
+        $aCurrentValueFields = [];
+        foreach ($oDbSearchWithConditions->GetInternalParams() as $sValue) {
+            $aCurrentValueFields[] = $sValue;
+        }
+        $value = implode(" ", $aCurrentValueFields);
+        $sReason = Dict::Format('UI:CSVReport-Value-NoMatch', $value);
+        return new CellStatus_SearchIssue($sSerializedSearch, $sReason, $oDbSearchWithConditions->GetClass(), $allowedValues, $sAllowedValuesOql);
+    }
+
+    protected function PrepareMissingObject(&$oTargetObj, &$aErrors)
+    {
+        $aResults = array();
+        $aErrors = array();
+
+        // External keys
+        //
+        foreach ($this->m_aExtKeys as $sAttCode => $aKeyConfig) {
+            //$oExtKey = MetaModel::GetAttributeDef(get_class($oTargetObj), $sAttCode);
+            $aResults[$sAttCode] = new CellStatus_Void($oTargetObj->Get($sAttCode));
+
+            foreach ($aKeyConfig as $sForeignAttCode => $iCol) {
+                $aResults[$iCol] = new CellStatus_Void('?');
+            }
+        }
+
+        // Update attributes
+        //
+        foreach ($this->m_aOnDisappear as $sAttCode => $value) {
+            if (!MetaModel::IsValidAttCode(get_class($oTargetObj), $sAttCode)) {
+                throw new BulkChangeException('Invalid attribute code', array('class' => get_class($oTargetObj), 'attcode' => $sAttCode));
+            }
+            $oTargetObj->Set($sAttCode, $value);
+        }
+
+        // Reporting on fields
+        //
+        $aChangedFields = $oTargetObj->ListChanges();
+        foreach ($this->m_aAttList as $sAttCode => $iCol) {
+            if ($sAttCode == 'id') {
+                $aResults[$iCol] = new CellStatus_Void($oTargetObj->GetKey());
+            }
+            if (array_key_exists($sAttCode, $aChangedFields)) {
+                $aResults[$iCol] = new CellStatus_Modify($oTargetObj->Get($sAttCode), $oTargetObj->GetOriginal($sAttCode));
+            } else {
+                // By default... nothing happens
+                $aResults[$iCol] = new CellStatus_Void($oTargetObj->Get($sAttCode));
+            }
+        }
+
+        // Checks
+        //
+        $res = $oTargetObj->CheckConsistency();
+        if ($res !== true) {
+            // $res contains the error description
+            $aErrors["GLOBAL"] = Dict::Format('UI:CSVReport-Row-Issue-Inconsistent', $res);
+        }
+        return $aResults;
+    }
+
+
+    protected function CreateObject(&$aResult, $iRow, $aRowData, CMDBChange $oChange = null)
+    {
+        $oTargetObj = MetaModel::NewObject($this->m_sClass);
+
+        // Populate the cache for hierarchical keys (only if in verify mode)
+        if (is_null($oChange)) {
+            // 1. determine if a hierarchical key exists
+            foreach ($this->m_aExtKeys as $sAttCode => $aKeyConfig) {
+                $oExtKey = MetaModel::GetAttributeDef(get_class($oTargetObj), $sAttCode);
+                if (!$this->IsNullExternalKeySpec($aRowData, $sAttCode) && MetaModel::IsParentClass(get_class($oTargetObj), $this->m_sClass)) {
+                    // 2. Populate the cache for further checks
+                    $aCacheKeys = array();
+                    foreach ($aKeyConfig as $sForeignAttCode => $iCol) {
+                        // The foreign attribute is one of our reconciliation key
+                        if ($sForeignAttCode == 'id') {
+                            $value = $aRowData[$iCol];
+                        } else {
+                            if (!isset($this->m_aAttList[$sForeignAttCode]) || !isset($aRowData[$this->m_aAttList[$sForeignAttCode]])) {
+                                // the key is not in the import
+                                break 2;
+                            }
+                            $value = $aRowData[$this->m_aAttList[$sForeignAttCode]];
+                        }
+                        $aCacheKeys[] = $value;
+                    }
+                    $sCacheKey = implode('_|_', $aCacheKeys); // Unique key for this query...
+                    $this->m_aExtKeysMappingCache[$sAttCode][$sCacheKey] = array(
+                        'c' => 1,
+                        'k' => -1,
+                        'oql' => '',
+                        'h' => 0, // number of hits on this cache entry
+                    );
+                }
+            }
+        }
+
+        $aResult[$iRow] = $this->PrepareObject($oTargetObj, $aRowData, $aErrors);
+
+        if (count($aErrors) > 0) {
+            $sErrors = implode(', ', $aErrors);
+            $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Attribute'));
+            //__ERRORS__ used by tests only
+            $aResult[$iRow]["__ERRORS__"] = new RowStatus_Error($sErrors);
+            return $oTargetObj;
+        }
+
+        // Check that any external key will have a value proposed
+        $aMissingKeys = array();
+        foreach (MetaModel::GetExternalKeys($this->m_sClass) as $sExtKeyAttCode => $oExtKey) {
+            if (!$oExtKey->IsNullAllowed()) {
+                if (!array_key_exists($sExtKeyAttCode, $this->m_aExtKeys) && !array_key_exists($sExtKeyAttCode, $this->m_aAttList)) {
+                    $aMissingKeys[] = $oExtKey->GetLabel();
+                }
+            }
+        }
+        if (count($aMissingKeys) > 0) {
+            $sMissingKeys = implode(', ', $aMissingKeys);
+            $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::Format('UI:CSVReport-Row-Issue-MissingExtKey', $sMissingKeys));
+            return $oTargetObj;
+        }
+
+        // Optionally record the results
+        //
+        if ($oChange) {
+            $newID = $oTargetObj->DBInsert();
+        } else {
+            $newID = 0;
+        }
+
+        $aResult[$iRow]["__STATUS__"] = new RowStatus_NewObj();
+        $aResult[$iRow]["finalclass"] = get_class($oTargetObj);
+        $aResult[$iRow]["id"] = new CellStatus_Void($newID);
+
+        return $oTargetObj;
+    }
+
+    /**
+     * @param array $aResult
+     * @param int $iRow
+     * @param \CMDBObject $oTargetObj
+     * @param array $aRowData
+     * @param \CMDBChange $oChange
+     *
+     * @throws \CoreException
+     * @throws \CoreUnexpectedValue
+     * @throws \MissingQueryArgument
+     * @throws \MySQLException
+     * @throws \MySQLHasGoneAwayException
+     */
+    protected function UpdateObject(&$aResult, $iRow, $oTargetObj, $aRowData, CMDBChange $oChange = null)
+    {
+        $aResult[$iRow] = $this->PrepareObject($oTargetObj, $aRowData, $aErrors);
+
+        // Reporting
+        //
+        $aResult[$iRow]["finalclass"] = get_class($oTargetObj);
+        $aResult[$iRow]["id"] = new CellStatus_Void($oTargetObj->GetKey());
+
+        if (count($aErrors) > 0) {
+            $sErrors = implode(', ', $aErrors);
+            $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Attribute'));
+            //__ERRORS__ used by tests only
+            $aResult[$iRow]["__ERRORS__"] = new RowStatus_Error($sErrors);
+            return;
+        }
+
+        $aChangedFields = $oTargetObj->ListChanges();
+        if (count($aChangedFields) > 0) {
+            $aResult[$iRow]["__STATUS__"] = new RowStatus_Modify(count($aChangedFields));
+
+            // Optionaly record the results
+            //
+            if ($oChange) {
+                try {
+                    $oTargetObj->DBUpdate();
+                } catch (CoreException $e) {
+                    $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue($e->getMessage());
+                }
+            }
+        } else {
+            $aResult[$iRow]["__STATUS__"] = new RowStatus_NoChange();
+        }
+    }
+
+    /**
+     * @param array $aResult
+     * @param int $iRow
+     * @param \CMDBObject $oTargetObj
+     * @param \CMDBChange $oChange
+     *
+     * @throws \BulkChangeException
+     */
+    protected function UpdateMissingObject(&$aResult, $iRow, $oTargetObj, CMDBChange $oChange = null)
+    {
+        $aResult[$iRow] = $this->PrepareMissingObject($oTargetObj, $aErrors);
+
+        // Reporting
+        //
+        $aResult[$iRow]["finalclass"] = get_class($oTargetObj);
+        $aResult[$iRow]["id"] = new CellStatus_Void($oTargetObj->GetKey());
+
+        if (count($aErrors) > 0) {
+            $sErrors = implode(', ', $aErrors);
+            $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Attribute'));
+            //__ERRORS__ used by tests only
+            $aResult[$iRow]["__ERRORS__"] = new RowStatus_Error($sErrors);
+            return;
+        }
+
+        $aChangedFields = $oTargetObj->ListChanges();
+        if (count($aChangedFields) > 0) {
+            $aResult[$iRow]["__STATUS__"] = new RowStatus_Disappeared(count($aChangedFields));
+
+            // Optionaly record the results
+            //
+            if ($oChange) {
+                try {
+                    $oTargetObj->DBUpdate();
+                } catch (CoreException $e) {
+                    $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue($e->getMessage());
+                }
+            }
+        } else {
+            $aResult[$iRow]["__STATUS__"] = new RowStatus_Disappeared(0);
+        }
+    }
+
+    public function Process(CMDBChange $oChange = null)
+    {
+        if ($oChange) {
+            CMDBObject::SetCurrentChange($oChange);
+        }
+
+        // Note: $oChange can be null, in which case the aim is to check what would be done
+
+        // Debug...
+        //
+        if (false) {
+            echo "<pre>\n";
+            echo "Attributes:\n";
+            print_r($this->m_aAttList);
+            echo "ExtKeys:\n";
+            print_r($this->m_aExtKeys);
+            echo "Reconciliation:\n";
+            print_r($this->m_aReconcilKeys);
+            echo "Synchro scope:\n";
+            print_r($this->m_sSynchroScope);
+            echo "Synchro changes:\n";
+            print_r($this->m_aOnDisappear);
+            //echo "Data:\n";
+            //print_r($this->m_aData);
+            echo "</pre>\n";
+            exit;
+        }
+
+        $aResult = array();
+
+        if (!is_null($this->m_sDateFormat) && (strlen($this->m_sDateFormat) > 0)) {
+            $sDateTimeFormat = $this->m_sDateFormat; // the specified format is actually the date AND time format
+            $oDateTimeFormat = new DateTimeFormat($sDateTimeFormat);
+            $sDateFormat = $oDateTimeFormat->ToDateFormat();
+            AttributeDateTime::SetFormat($oDateTimeFormat);
+            AttributeDate::SetFormat(new DateTimeFormat($sDateFormat));
+            // Translate dates from the source data
+            //
+            foreach ($this->m_aAttList as $sAttCode => $iCol) {
+                if ($sAttCode == 'id') continue;
+
+                $oAttDef = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
+                if ($oAttDef instanceof AttributeDateTime) // AttributeDate is derived from AttributeDateTime
+                {
+                    foreach ($this->m_aData as $iRow => $aRowData) {
+                        $sFormat = $sDateTimeFormat;
+                        if (!isset($this->m_aData[$iRow][$iCol])) {
+                            continue;
+                        }
+                        $sValue = $this->m_aData[$iRow][$iCol];
+                        if (!empty($sValue)) {
+                            if ($oAttDef instanceof AttributeDate) {
+                                $sFormat = $sDateFormat;
+                            }
+                            $oFormat = new DateTimeFormat($sFormat);
+                            $sDateExample = $oFormat->Format(new DateTime('2022-10-23 16:25:33'));
+                            $sRegExp = $oFormat->ToRegExpr('/');
+                            $sErrorMsg = Dict::Format('UI:CSVReport-Row-Issue-ExpectedDateFormat', $sDateExample);
+                            if (!preg_match($sRegExp, $sValue)) {
+                                $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-DateFormat'));
+                                $aResult[$iRow][$iCol] = new CellStatus_Issue($sValue, null, $sErrorMsg);
+
+                            } else {
+                                $oDate = DateTime::createFromFormat($sFormat, $sValue);
+                                if ($oDate !== false) {
+                                    $sNewDate = $oDate->format($oAttDef->GetInternalFormat());
+                                    $this->m_aData[$iRow][$iCol] = $sNewDate;
+                                } else {
+                                    // almost impossible ti reproduce since even incorrect dates with correct formats are formated and $oDate will not be false
+                                    // Leave the cell unchanged
+                                    $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-DateFormat'));
+                                    $aResult[$iRow][$iCol] = new CellStatus_Issue($sValue, null, $sErrorMsg);
+                                }
+                            }
+                        } else {
+                            $this->m_aData[$iRow][$iCol] = '';
+                        }
+                    }
+                }
+            }
+        }
+
+        // Compute the results
+        //
+        if (!is_null($this->m_sSynchroScope)) {
+            $aVisited = array();
+        }
+        $iPreviousTimeLimit = ini_get('max_execution_time');
+        $iLoopTimeLimit = MetaModel::GetConfig()->Get('max_execution_time_per_loop');
+
+        // Avoid too many events
+        cmdbAbstractObject::SetEventDBLinksChangedBlocked(true);
+        try {
+            foreach ($this->m_aData as $iRow => $aRowData) {
+                set_time_limit(intval($iLoopTimeLimit));
+                // Stop if not the good number of cols in $aRowData
+                if ($this->m_iNbCol > 0 && count($aRowData) != $this->m_iNbCol) {
+                    $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::Format('UI:CSVReport-Row-Issue-NbField', count($aRowData), $this->m_iNbCol));
+                    continue;
+                }
+
+                if (isset($aResult[$iRow]["__STATUS__"])) {
+                    // An issue at the earlier steps - skip the rest
+                    continue;
+                }
+                try {
+                    $oReconciliationFilter = new DBObjectSearch($this->m_sClass);
+                    $bSkipQuery = false;
+                    foreach ($this->m_aReconcilKeys as $sAttCode) {
+                        $valuecondition = null;
+                        if (array_key_exists($sAttCode, $this->m_aExtKeys)) {
+                            if ($this->IsNullExternalKeySpec($aRowData, $sAttCode)) {
+                                $oExtKey = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
+                                if ($oExtKey->IsNullAllowed()) {
+                                    $valuecondition = $oExtKey->GetNullValue();
+                                    $aResult[$iRow][$sAttCode] = new CellStatus_Void($oExtKey->GetNullValue());
+                                } else {
+                                    $aResult[$iRow][$sAttCode] = new CellStatus_NullIssue();
+                                }
+                            } else {
+                                // The value has to be found or verified
+
+                                /** var DBObjectSearch $oReconFilter */
+                                list($oReconFilter, $aMatches) = $this->ResolveExternalKey($aRowData, $sAttCode, $aResult[$iRow]);
+
+                                if (count($aMatches) == 1) {
+                                    $oRemoteObj = reset($aMatches); // first item
+                                    $valuecondition = $oRemoteObj->GetKey();
+                                    $aResult[$iRow][$sAttCode] = new CellStatus_Void($oRemoteObj->GetKey());
+                                } elseif (count($aMatches) == 0) {
+                                    $oCellStatus_SearchIssue = $this->GetCellSearchIssue($oReconFilter);
+                                    $aResult[$iRow][$sAttCode] = $oCellStatus_SearchIssue;
+                                } else {
+                                    $aResult[$iRow][$sAttCode] = new CellStatus_Ambiguous(null, count($aMatches), $oReconFilter->serialize());
+                                }
+                            }
+                        } else {
+                            // The value is given in the data row
+                            $iCol = $this->m_aAttList[$sAttCode];
+                            if ($sAttCode == 'id') {
+                                $valuecondition = $aRowData[$iCol];
+                            } else {
+                                $oAttDef = MetaModel::GetAttributeDef($this->m_sClass, $sAttCode);
+                                $valuecondition = $oAttDef->MakeValueFromString($aRowData[$iCol], $this->m_bLocalizedValues);
+                            }
+                        }
+                        if (is_null($valuecondition)) {
+                            $bSkipQuery = true;
+                        } else {
+                            $oReconciliationFilter->AddCondition($sAttCode, $valuecondition, '=', true);
+                        }
+                    }
+                    if ($bSkipQuery) {
+                        $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Reconciliation'));
+                    } else {
+                        $oReconciliationSet = new CMDBObjectSet($oReconciliationFilter);
+                        switch ($oReconciliationSet->Count()) {
+                            case 0:
+                                $oTargetObj = $this->CreateObject($aResult, $iRow, $aRowData, $oChange);
+                                // $aResult[$iRow]["__STATUS__"]=> set in CreateObject
+                                $aVisited[] = $oTargetObj->GetKey();
+                                break;
+                            case 1:
+                                $oTargetObj = $oReconciliationSet->Fetch();
+                                $this->UpdateObject($aResult, $iRow, $oTargetObj, $aRowData, $oChange);
+                                // $aResult[$iRow]["__STATUS__"]=> set in UpdateObject
+                                if (!is_null($this->m_sSynchroScope)) {
+                                    $aVisited[] = $oTargetObj->GetKey();
+                                }
+                                break;
+                            default:
+                                // Found several matches, ambiguous
+                                $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::S('UI:CSVReport-Row-Issue-Ambiguous'));
+                                $aResult[$iRow]["id"] = new CellStatus_Ambiguous(0, $oReconciliationSet->Count(), $oReconciliationFilter->serialize());
+                                $aResult[$iRow]["finalclass"] = 'n/a';
+                        }
+                    }
+                } catch (Exception $e) {
+                    $aResult[$iRow]["__STATUS__"] = new RowStatus_Issue(Dict::Format('UI:CSVReport-Row-Issue-Internal', get_class($e), $e->getMessage()));
+                }
+            }
+
+            if (!is_null($this->m_sSynchroScope)) {
+                // Compute the delta between the scope and visited objects
+                $oScopeSearch = DBObjectSearch::FromOQL($this->m_sSynchroScope);
+                $oScopeSet = new DBObjectSet($oScopeSearch);
+                while ($oObj = $oScopeSet->Fetch()) {
+                    $iObj = $oObj->GetKey();
+                    if (!in_array($iObj, $aVisited)) {
+                        set_time_limit(intval($iLoopTimeLimit));
+                        $iRow++;
+                        $this->UpdateMissingObject($aResult, $iRow, $oObj, $oChange);
+                    }
+                }
+            }
+        } finally {
+            // Send all the retained events for further computations
+            cmdbAbstractObject::SetEventDBLinksChangedBlocked(false);
+            cmdbAbstractObject::FireEventDbLinksChangedForAllObjects();
+        }
+
+        set_time_limit(intval($iPreviousTimeLimit));
+
+        // Fill in the blanks - the result matrix is expected to be 100% complete
+        //
+        foreach ($this->m_aData as $iRow => $aRowData) {
+            foreach ($this->m_aAttList as $iCol) {
+                if (!array_key_exists($iCol, $aResult[$iRow])) {
+                    if (isset($aRowData[$iCol])) {
+                        $aResult[$iRow][$iCol] = new CellStatus_Void($aRowData[$iCol]);
+                    } else {
+                        $aResult[$iRow][$iCol] = new CellStatus_Issue('', null, Dict::S('UI:CSVReport-Value-Issue-NoValue'));
+                    }
+                }
+            }
+            foreach ($this->m_aExtKeys as $sAttCode => $aForeignAtts) {
+                if (!array_key_exists($sAttCode, $aResult[$iRow])) {
+                    $aResult[$iRow][$sAttCode] = new CellStatus_Void('n/a');
+                }
+                foreach ($aForeignAtts as $sForeignAttCode => $iCol) {
+                    if (!array_key_exists($iCol, $aResult[$iRow])) {
+                        // The foreign attribute is one of our reconciliation key
+                        if (isset($aRowData[$iCol])) {
+                            $aResult[$iRow][$iCol] = new CellStatus_Void($aRowData[$iCol]);
+                        } else {
+                            $aResult[$iRow][$iCol] = new CellStatus_Issue('', null, 'UI:CSVReport-Value-Issue-NoValue');
+                        }
+                    }
+                }
+            }
+        }
+
+        return $aResult;
+    }
+
+    /**
+     * Display the history of bulk imports
+     */
+    static function DisplayImportHistory(\Combodo\iTop\Application\WebPage\WebPage $oPage, $bFromAjax = false, $bShowAll = false)
+    {
+        $sAjaxDivId = "CSVImportHistory";
+        if (!$bFromAjax) {
+            $oPage->add('<div id="' . $sAjaxDivId . '">');
+        }
+
+        $oPage->p(Dict::S('UI:History:BulkImports+') . ' <span id="csv_history_reload"></span>');
+
+        $oBulkChangeSearch = DBObjectSearch::FromOQL("SELECT CMDBChange WHERE origin IN ('csv-interactive', 'csv-import.php')");
+
+        $iQueryLimit = $bShowAll ? 0 : appUserPreferences::GetPref('default_page_size', MetaModel::GetConfig()->GetMinDisplayLimit());
+        $oBulkChanges = new DBObjectSet($oBulkChangeSearch, array('date' => false), array(), null, $iQueryLimit);
+
+        $oAppContext = new ApplicationContext();
+
+        $bLimitExceeded = false;
+        if ($oBulkChanges->Count() > (appUserPreferences::GetPref('default_page_size', MetaModel::GetConfig()->GetMinDisplayLimit()))) {
+            $bLimitExceeded = true;
+            if (!$bShowAll) {
+                $iMaxObjects = appUserPreferences::GetPref('default_page_size', MetaModel::GetConfig()->GetMinDisplayLimit());
+                $oBulkChanges->SetLimit($iMaxObjects);
+            }
+        }
+        $oBulkChanges->Seek(0);
+
+        $aDetails = array();
+        while ($oChange = $oBulkChanges->Fetch()) {
+            $sDate = '<a href="csvimport.php?step=10&changeid=' . $oChange->GetKey() . $oAppContext->GetForLink(true) . '">' . $oChange->Get('date') . '</a>';
+            $sUser = $oChange->GetUserName();
+            if (preg_match('/^(.*)\\(CSV\\)$/i', $oChange->Get('userinfo'), $aMatches)) {
+                $sUser = $aMatches[1];
+            } else {
+                $sUser = $oChange->Get('userinfo');
+            }
+
+            $oOpSearch = DBObjectSearch::FromOQL("SELECT CMDBChangeOpCreate WHERE change = :change_id");
+            $oOpSet = new DBObjectSet($oOpSearch, array(), array('change_id' => $oChange->GetKey()));
+            $iCreated = $oOpSet->Count();
+
+            // Get the class from the first item found (assumption: a CSV load is done for a single class)
+            if ($oCreateOp = $oOpSet->Fetch()) {
+                $sClass = $oCreateOp->Get('objclass');
+            }
+
+            $oOpSearch = DBObjectSearch::FromOQL("SELECT CMDBChangeOpSetAttribute WHERE change = :change_id");
+            $oOpSet = new DBObjectSet($oOpSearch, array(), array('change_id' => $oChange->GetKey()));
+
+            $aModified = array();
+            $aAttList = array();
+            while ($oModified = $oOpSet->Fetch()) {
+                // Get the class (if not done earlier on object creation)
+                $sClass = $oModified->Get('objclass');
+                $iKey = $oModified->Get('objkey');
+                $sAttCode = $oModified->Get('attcode');
+
+                $aAttList[$sClass][$sAttCode] = true;
+                $aModified["$sClass::$iKey"] = true;
+            }
+            $iModified = count($aModified);
+
+            // Assumption: there is only one class of objects being loaded
+            // Then the last class found gives us the class for every object
+            if (($iModified > 0) || ($iCreated > 0)) {
+                $aDetails[] = array('date' => $sDate, 'user' => $sUser, 'class' => $sClass, 'created' => $iCreated, 'modified' => $iModified);
+            }
+        }
+
+        $aConfig = array('date' => array('label' => Dict::S('UI:History:Date'), 'description' => Dict::S('UI:History:Date+')),
+            'user' => array('label' => Dict::S('UI:History:User'), 'description' => Dict::S('UI:History:User+')),
+            'class' => array('label' => Dict::S('Core:AttributeClass'), 'description' => Dict::S('Core:AttributeClass+')),
+            'created' => array('label' => Dict::S('UI:History:StatsCreations'), 'description' => Dict::S('UI:History:StatsCreations+')),
+            'modified' => array('label' => Dict::S('UI:History:StatsModifs'), 'description' => Dict::S('UI:History:StatsModifs+')),
+        );
+
+        if ($bLimitExceeded) {
+            if ($bShowAll) {
+                // Collapsible list
+                $oPage->add('<p>' . Dict::Format('UI:CountOfResults', $oBulkChanges->Count()) . '&nbsp;&nbsp;<a class="truncated" onclick="OnTruncatedHistoryToggle(false);">' . Dict::S('UI:CollapseList') . '</a></p>');
+            } else {
+                // Truncated list
+                $iMinDisplayLimit = appUserPreferences::GetPref('default_page_size', MetaModel::GetConfig()->GetMinDisplayLimit());
+                $sCollapsedLabel = Dict::Format('UI:TruncatedResults', $iMinDisplayLimit, $oBulkChanges->Count());
+                $sLinkLabel = Dict::S('UI:DisplayAll');
+                $oPage->add('<p>' . $sCollapsedLabel . '&nbsp;&nbsp;<a class="truncated" onclick="OnTruncatedHistoryToggle(true);">' . $sLinkLabel . '</p>');
+
+                $oPage->add_ready_script(
+                    <<<EOF
+	$('#$sAjaxDivId table.listResults').addClass('truncated');
+	$('#$sAjaxDivId table.listResults tr:last td').addClass('truncated');
+EOF
+                );
+
+
+                $sAppContext = $oAppContext->GetForLink();
+                $oPage->add_script(
+                    <<<EOF
+	function OnTruncatedHistoryToggle(bShowAll)
+	{
+		$('#csv_history_reload').html('<img src="' + GetAbsoluteUrlAppRoot() + 'images/indicator.gif"/>');
+		$.get(GetAbsoluteUrlAppRoot()+'pages/ajax.render.php?$sAppContext', {operation: 'displayCSVHistory', showall: bShowAll}, function(data)
+			{
+				$('#$sAjaxDivId').html(data);
+			}
+		);
+	}
+EOF
+                );
+            }
+        } else {
+            // Normal display - full list without any decoration
+        }
+
+        $oPage->table($aConfig, $aDetails);
+
+        if (!$bFromAjax) {
+            $oPage->add('</div>');
+        }
+    }
+
+    /**
+     * Display the details of an import
+     *
+     * @param \Combodo\iTop\Application\WebPage\iTopWebPage $oPage
+     * @param $iChange
+     *
+     * @throws Exception
+     */
+    static function DisplayImportHistoryDetails(\Combodo\iTop\Application\WebPage\iTopWebPage $oPage, $iChange)
+    {
+        if ($iChange == 0) {
+            throw new Exception("Missing parameter changeid");
+        }
+        $oChange = MetaModel::GetObject('CMDBChange', $iChange, false);
+        if (is_null($oChange)) {
+            throw new Exception("Unknown change: $iChange");
+        }
+        $oPage->add("<div><p><h1>" . Dict::Format('UI:History:BulkImportDetails', $oChange->Get('date'), $oChange->GetUserName()) . "</h1></p></div>\n");
+
+        // Assumption : change made one single class of objects
+        $aObjects = array();
+        $aAttributes = array(); // array of attcode => occurences
+
+        $oOpSearch = DBObjectSearch::FromOQL("SELECT CMDBChangeOp WHERE change = :change_id");
+        $oOpSet = new DBObjectSet($oOpSearch, array(), array('change_id' => $iChange));
+        while ($oOperation = $oOpSet->Fetch()) {
+            $sClass = $oOperation->Get('objclass');
+            $iKey = $oOperation->Get('objkey');
+            $iObjId = "$sClass::$iKey";
+            if (!isset($aObjects[$iObjId])) {
+                $aObjects[$iObjId] = array();
+                $aObjects[$iObjId]['__class__'] = $sClass;
+                $aObjects[$iObjId]['__id__'] = $iKey;
+            }
+            if (get_class($oOperation) == 'CMDBChangeOpCreate') {
+                $aObjects[$iObjId]['__created__'] = true;
+            } elseif ($oOperation instanceof CMDBChangeOpSetAttribute) {
+                $sAttCode = $oOperation->Get('attcode');
+
+                if ((get_class($oOperation) == 'CMDBChangeOpSetAttributeScalar') || (get_class($oOperation) == 'CMDBChangeOpSetAttributeURL')) {
+                    $oAttDef = MetaModel::GetAttributeDef($sClass, $sAttCode);
+                    if ($oAttDef->IsExternalKey()) {
+                        $sOldValue = Dict::S('UI:UndefinedObject');
+                        if ($oOperation->Get('oldvalue') != 0) {
+                            $oOldTarget = MetaModel::GetObject($oAttDef->GetTargetClass(), $oOperation->Get('oldvalue'));
+                            $sOldValue = $oOldTarget->GetHyperlink();
+                        }
+
+                        $sNewValue = Dict::S('UI:UndefinedObject');
+                        if ($oOperation->Get('newvalue') != 0) {
+                            $oNewTarget = MetaModel::GetObject($oAttDef->GetTargetClass(), $oOperation->Get('newvalue'));
+                            $sNewValue = $oNewTarget->GetHyperlink();
+                        }
+                    } else {
+                        $sOldValue = $oOperation->GetAsHTML('oldvalue');
+                        $sNewValue = $oOperation->GetAsHTML('newvalue');
+                    }
+                    $aObjects[$iObjId][$sAttCode] = $sOldValue . ' -&gt; ' . $sNewValue;
+                } else {
+                    $aObjects[$iObjId][$sAttCode] = 'n/a';
+                }
+
+                if (isset($aAttributes[$sAttCode])) {
+                    $aAttributes[$sAttCode]++;
+                } else {
+                    $aAttributes[$sAttCode] = 1;
+                }
+            }
+        }
+
+        $aDetails = array();
+        foreach ($aObjects as $iUId => $aObjData) {
+            $aRow = array();
+            $oObject = MetaModel::GetObject($aObjData['__class__'], $aObjData['__id__'], false);
+            if (is_null($oObject)) {
+                $aRow['object'] = $aObjData['__class__'] . '::' . $aObjData['__id__'] . ' (deleted)';
+            } else {
+                $aRow['object'] = $oObject->GetHyperlink();
+            }
+            if (isset($aObjData['__created__'])) {
+                $aRow['operation'] = Dict::S('Change:ObjectCreated');
+            } else {
+                $aRow['operation'] = Dict::S('Change:ObjectModified');
+            }
+            foreach ($aAttributes as $sAttCode => $iOccurences) {
+                if (isset($aObjData[$sAttCode])) {
+                    $aRow[$sAttCode] = $aObjData[$sAttCode];
+                } elseif (!is_null($oObject)) {
+                    // This is the current vaslue: $oObject->GetAsHtml($sAttCode)
+                    // whereas we are displaying the value that was set at the time
+                    // the object was created
+                    // This requires addtional coding...let's do that later
+                    $aRow[$sAttCode] = '';
+                } else {
+                    $aRow[$sAttCode] = '';
+                }
+            }
+            $aDetails[] = $aRow;
+        }
+
+        $aConfig = array();
+        $aConfig['object'] = array('label' => MetaModel::GetName($sClass), 'description' => MetaModel::GetClassDescription($sClass));
+        $aConfig['operation'] = array('label' => Dict::S('UI:History:Changes'), 'description' => Dict::S('UI:History:Changes+'));
+        foreach ($aAttributes as $sAttCode => $iOccurences) {
+            $aConfig[$sAttCode] = array('label' => MetaModel::GetLabel($sClass, $sAttCode), 'description' => MetaModel::GetDescription($sClass, $sAttCode));
+        }
+        $oPage->table($aConfig, $aDetails);
+    }
+}
\ No newline at end of file