diff --git a/core/ormlinkset.class.inc.php b/core/ormlinkset.class.inc.php
index 2f5037af0..8639f3efe 100644
--- a/core/ormlinkset.class.inc.php
+++ b/core/ormlinkset.class.inc.php
@@ -123,7 +123,8 @@ class ormLinkSet implements iDBObjectSetIterator, Iterator, SeekableIterator
 	{
 		assert($oLink instanceof $this->sClass);
 		// No impact on the iteration algorithm
-		$this->aAdded[] = $oLink;
+        $iObjectId = $oLink->GetKey();
+		$this->aAdded[$iObjectId] = $oLink;
 		$this->bHasDelta = true;
 	}
 
@@ -148,6 +149,13 @@ class ormLinkSet implements iDBObjectSetIterator, Iterator, SeekableIterator
 			$this->aRemoved[$iObjectId] = $iObjectId;
 			$this->bHasDelta = true;
 		}
+		else
+        {
+            if (array_key_exists($iObjectId, $this->aAdded))
+            {
+                unset($this->aAdded[$iObjectId]);
+            }
+        }
 	}
 
 	/**
@@ -587,7 +595,7 @@ class ormLinkSet implements iDBObjectSetIterator, Iterator, SeekableIterator
 			$oSearch->AddCondition($sExtKeyToMe, $oHostObject->GetKey(), '=');
 			$oSearch->AddCondition($sExtKeyToRemote, $aCheckRemote, 'IN');
 			$oSet = new DBObjectSet($oSearch);
-			$aExistingRemote = $oSet->GetColumnAsArray($sExtKeyToRemote);
+			$aExistingRemote = $oSet->GetColumnAsArray($sExtKeyToRemote, true);
 		}
 
 		// Write the links according to the existing links
@@ -601,11 +609,28 @@ class ormLinkSet implements iDBObjectSetIterator, Iterator, SeekableIterator
 			{
 				if (count($aCheckRemote) > 0)
 				{
-					if (in_array($oLink->Get($sExtKeyToRemote), $aExistingRemote))
-					{
-						// Do not create a duplicate
-						continue;
-					}
+				    $bIsDuplicate = false;
+				    foreach($aExistingRemote as $sLinkKey => $sExtKey)
+                    {
+                        if ($sExtKey == $oLink->Get($sExtKeyToRemote))
+                        {
+                            // Do not create a duplicate
+                            // + In the case of a remove action followed by an add action
+                            // of an existing link,
+                            // the final state to consider is add action,
+                            // so suppress the entry in the removed list.
+                            if (array_key_exists($sLinkKey, $this->aRemoved))
+                            {
+                                unset($this->aRemoved[$sLinkKey]);
+                            }
+                            $bIsDuplicate = true;
+                            break;
+                        }
+                    }
+                    if ($bIsDuplicate)
+                    {
+                        continue;
+                    }
 				}
 
 			}
diff --git a/datamodels/2.x/itop-tickets/main.itop-tickets.php b/datamodels/2.x/itop-tickets/main.itop-tickets.php
index b10abdf35..7126eba0b 100755
--- a/datamodels/2.x/itop-tickets/main.itop-tickets.php
+++ b/datamodels/2.x/itop-tickets/main.itop-tickets.php
@@ -1,287 +1,286 @@
-<?php
-// Copyright (C) 2010-2017 Combodo SARL
-//
-//   This file is part of iTop.
-//
-//   iTop is free software; you can redistribute it and/or modify	
-//   it under the terms of the GNU Affero General Public License as published by
-//   the Free Software Foundation, either version 3 of the License, or
-//   (at your option) any later version.
-//
-//   iTop is distributed in the hope that it will be useful,
-//   but WITHOUT ANY WARRANTY; without even the implied warranty of
-//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-//   GNU Affero General Public License for more details.
-//
-//   You should have received a copy of the GNU Affero General Public License
-//   along with iTop. If not, see <http://www.gnu.org/licenses/>
-
-
-/**
- * Base class for computing TTO or TTR on a ticket
- */ 
-class ResponseTicketSLT
-{
-	/**
-	 * Determines the shortest SLT, for this ticket, for the given metric. Returns null is no SLT was found
-	 * @param string $sMetric Type of metric 'TTO', 'TTR', etc as defined in the SLT class
-	 * @return hash Array with 'SLT' => name of the SLT selected, 'value' => duration in seconds of the SLT metric, null if no SLT applies to this ticket
-	 */
-	protected static function ComputeSLT($oTicket, $sMetric = 'TTO')
-	{
-		$iDeadline = null;
-		if (MetaModel::IsValidClass('SLT'))
-		{
-			$sType=get_class($oTicket);
-			if ($sType == 'Incident')
-			{
-				$sRequestType = 'incident';
-			}
-			else
-			{
-				$sRequestType = $oTicket->Get('request_type');
-			}
-			
-			$aArgs = $oTicket->ToArgs();
-			$aArgs['metric'] = $sMetric;
-			$aArgs['request_type'] = $sRequestType;
-				
-			//echo "<p>Managing:".$sMetric."-".$this->Get('request_type')."-".$this->Get('importance')."</p>\n";
-			$oSLTSet = new DBObjectSet(DBObjectSearch::FromOQL(RESPONSE_TICKET_SLT_QUERY),
-						array(),
-						$aArgs
-						);
-
-			$iMinDuration = PHP_INT_MAX;
-			$sSLTName = '';
-	
-			while($oSLT = $oSLTSet->Fetch())
-			{
-				$iDuration = (int)$oSLT->Get('value');
-				$sUnit = $oSLT->Get('unit');
-				switch($sUnit)
-				{
-					case 'days':
-					$iDuration = $iDuration * 24; // 24 hours in 1 days
-					// Fall though
-					
-					case 'hours':
-					$iDuration = $iDuration * 60; // 60 minutes in 1 hour
-					// Fall though
-					
-					case 'minutes':
-					$iDuration = $iDuration * 60;
-				}
-				if ($iDuration < $iMinDuration)
-				{
-					$iMinDuration = $iDuration;
-					$sSLTName = $oSLT->GetName();
-				}
-			}
-			if ($iMinDuration == PHP_INT_MAX)
-			{
-				$iDeadline = null;
-			}
-			else
-			{
-				// Store $sSLTName to keep track of which SLT has been used
-				$iDeadline = $iMinDuration;
-			}
-		}
-		return $iDeadline;			
-
-	}
-}
-
-/**
- * Compute the TTO of a ticket - null if the class 'SLT' does not exist
- */ 
-class ResponseTicketTTO extends ResponseTicketSLT implements iMetricComputer
-{
-	public static function GetDescription()
-	{
-		return "Time to own a ticket";
-	}
-
-	public function ComputeMetric($oObject)
-	{
-		$iRes = $this->ComputeSLT($oObject, 'TTO');
-		return $iRes;
-	}
-}
-
-/**
- * Compute the TTR of a ticket - null if the class 'SLT' does not exist
- */ 
-class ResponseTicketTTR extends ResponseTicketSLT implements iMetricComputer
-{
-	public static function GetDescription()
-	{
-		return "Time to resolve a ticket";
-	}
-
-	public function ComputeMetric($oObject)
-	{
-		$iRes = $this->ComputeSLT($oObject, 'TTR');
-		return $iRes;
-	}
-}
-
-
-class _Ticket extends cmdbAbstractObject
-{
-
-	public function UpdateImpactedItems()
-	{
-		require_once(APPROOT.'core/displayablegraph.class.inc.php');
-		$oContactsSet = $this->Get('contacts_list');
-		$oCIsSet = $this->Get('functionalcis_list');
-
-		$aCIsToImpactCode = array();
-		$aSources = array();
-		$aExcluded = array();
-		
-		$oCIsSet->Rewind();
-		while ($oLink = $oCIsSet->Fetch())
-		{
-			$iKey = $oLink->Get('functionalci_id');
-			$aCIsToImpactCode[$iKey] = $oLink->Get('impact_code');
-			if ($oLink->Get('impact_code') == 'manual')
-			{
-				$oObj = MetaModel::GetObject('FunctionalCI', $iKey);
-				$aSources[$iKey] = $oObj;
-			}
-			else if ($oLink->Get('impact_code') == 'not_impacted')
-			{
-				$oObj = MetaModel::GetObject('FunctionalCI', $iKey);
-				$aExcluded[$iKey] = $oObj;
-			}
-		}
-		
-		$aContactsToRoleCode = array();
-		$oContactsSet->Rewind();
-		while ($oLink = $oContactsSet->Fetch())
-		{
-			$iKey = $oLink->Get('contact_id');
-			$aContactsToRoleCode[$iKey] = $oLink->Get('role_code');
-			if ($oLink->Get('role_code') == 'do_not_notify')
-			{
-				$oObj = MetaModel::GetObject('Contact', $iKey);
-				$aExcluded[$iKey] = $oObj;
-			}
-		}
-		
-		$oNewCIsSet = DBObjectSet::FromScratch('lnkFunctionalCIToTicket');
-		foreach($aCIsToImpactCode as $iKey => $sImpactCode)
-		{
-			if ($sImpactCode != 'computed')
-			{
-				$oNewLink = new lnkFunctionalCIToTicket();
-				$oNewLink->Set('functionalci_id', $iKey);
-				$oNewLink->Set('impact_code', $sImpactCode);
-				$oNewCIsSet->AddObject($oNewLink);				
-			}
-		}
-		
-		$oNewContactsSet = DBObjectSet::FromScratch('lnkContactToTicket');
-		foreach($aContactsToRoleCode as $iKey => $sImpactCode)
-		{
-			if ($sImpactCode != 'computed')
-			{
-				$oNewLink = new lnkContactToTicket();
-				$oNewLink->Set('contact_id', $iKey);
-				$oNewLink->Set('role_code', $sImpactCode);
-				$oNewContactsSet->AddObject($oNewLink);
-			}
-		}
-		
-		$sContextKey = 'itop-tickets/relation_context/'.get_class($this).'/impacts/down';
-		$aContextDefs = DisplayableGraph::GetContextDefinitions($sContextKey, true, array('this' => $this));
-		$aDefaultContexts = array();
-		foreach($aContextDefs as $sKey => $aDefinition)
-		{
-			// Add the default context queries to the computation
-			if (array_key_exists('default', $aDefinition) && ($aDefinition['default'] == 'yes'))
-			{
-				$aDefaultContexts[] = $aDefinition['oql'];
-			}
-		}
-		// Merge the directly impacted items with the "new" ones added by the "context" queries
-		$aGraphObjects = array();
-		$oRawGraph = MetaModel::GetRelatedObjectsDown('impacts', $aSources, 10, true /* bEnableRedundancy */, $aExcluded);
-		$oIterator = new RelationTypeIterator($oRawGraph, 'Node');
-		foreach ($oIterator as $oNode)
-		{
-			// Any object node reached AND different from a source will do
-			if ( ($oNode instanceof RelationObjectNode) && ($oNode->GetProperty('is_reached')) && (!$oNode->GetProperty('source')) )
-			{
-				$oObj = $oNode->GetProperty('object');
-				$iKey = $oObj->GetKey();
-				$aGraphObjects[get_class($oObj).'::'.$iKey] = $oNode->GetProperty('object');
-			}
-		}
-		
-		if (count($aDefaultContexts) > 0)
-		{
-			$oAnnotatedGraph = MetaModel::GetRelatedObjectsDown('impacts', $aSources, 10, true /* bEnableRedundancy */, $aExcluded, $aDefaultContexts);
-			$oIterator = new RelationTypeIterator($oAnnotatedGraph, 'Node');
-			foreach ($oIterator as $oNode)
-			{
-				// Only pick the nodes which are NOT impacted by a context root cause, and merge them in the list
-				if ( ($oNode instanceof RelationObjectNode) && ($oNode->GetProperty('is_reached')) && (!$oNode->GetProperty('source')) && ($oNode->GetProperty('context_root_causes', null) == null) )
-				{
-					$oObj = $oNode->GetProperty('object');
-					$iKey = $oObj->GetKey();
-					$aGraphObjects[get_class($oObj).'::'.$iKey] = $oNode->GetProperty('object');
-				}
-			}
-		}
-		
-		foreach ($aGraphObjects as $oObj)
-		{
-			$iKey = $oObj->GetKey();
-			$sRootClass = MetaModel::GetRootClass(get_class($oObj));
-			switch ($sRootClass)
-			{
-				case 'FunctionalCI':
-				// Only FunctionalCIs which are not already linked to the ticket
-				if (!array_key_exists($iKey, $aCIsToImpactCode) || ($aCIsToImpactCode[$iKey] != 'not_impacted'))
-				{
-					$oNewLink = new lnkFunctionalCIToTicket();
-					$oNewLink->Set('functionalci_id', $iKey);
-					$oNewLink->Set('impact_code', 'computed');
-					$oNewCIsSet->AddObject($oNewLink);
-				}
-				break;
-				
-				case 'Contact':
-				// Only link Contacts which are not already linked to the ticket
-				if (!array_key_exists($iKey, $aContactsToRoleCode) || ($aContactsToRoleCode[$iKey] != 'do_not_notify'))
-				{
-					$oNewLink = new lnkContactToTicket();
-					$oNewLink->Set('contact_id', $iKey);
-					$oNewLink->Set('role_code', 'computed');
-					$oNewContactsSet->AddObject($oNewLink);
-				}
-				break;
-			}
-		}
-		$this->Set('functionalcis_list', $oNewCIsSet);
-		$this->Set('contacts_list', $oNewContactsSet);
-	}
-	
-	public function DisplayBareRelations(WebPage $oPage, $bEditMode = false)
-	{
-		parent::DisplayBareRelations($oPage, $bEditMode);
-		// Display the impact analysis for tickets not in 'closed' or 'resolved' status... and not in edition
-		if ((!$bEditMode) && (!in_array($this->Get('status'), array('resolved', 'closed'))))
-		{
-			$oPage->add_linked_script(utils::GetAbsoluteUrlAppRoot().'js/fraphael.js');
-			$oPage->add_linked_stylesheet(utils::GetAbsoluteUrlAppRoot().'css/jquery.contextMenu.css');
-			$oPage->add_linked_script(utils::GetAbsoluteUrlAppRoot().'js/jquery.contextMenu.js');
-			$oPage->add_linked_script(utils::GetAbsoluteUrlAppRoot().'js/simple_graph.js');
-			$oPage->AddAjaxTab(Dict::S('Ticket:ImpactAnalysis'), utils::GetAbsoluteUrlAppRoot().'pages/ajax.render.php?operation=ticket_impact&class='.get_class($this).'&id='.$this->GetKey(), true);
-		}
-	}
-}
+<?php
+// Copyright (C) 2010-2017 Combodo SARL
+//
+//   This file is part of iTop.
+//
+//   iTop is free software; you can redistribute it and/or modify
+//   it under the terms of the GNU Affero General Public License as published by
+//   the Free Software Foundation, either version 3 of the License, or
+//   (at your option) any later version.
+//
+//   iTop is distributed in the hope that it will be useful,
+//   but WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//   GNU Affero General Public License for more details.
+//
+//   You should have received a copy of the GNU Affero General Public License
+//   along with iTop. If not, see <http://www.gnu.org/licenses/>
+
+
+/**
+ * Base class for computing TTO or TTR on a ticket
+ */
+class ResponseTicketSLT
+{
+	/**
+	 * Determines the shortest SLT, for this ticket, for the given metric. Returns null is no SLT was found
+	 * @param string $sMetric Type of metric 'TTO', 'TTR', etc as defined in the SLT class
+	 * @return hash Array with 'SLT' => name of the SLT selected, 'value' => duration in seconds of the SLT metric, null if no SLT applies to this ticket
+	 */
+	protected static function ComputeSLT($oTicket, $sMetric = 'TTO')
+	{
+		$iDeadline = null;
+		if (MetaModel::IsValidClass('SLT'))
+		{
+			$sType=get_class($oTicket);
+			if ($sType == 'Incident')
+			{
+				$sRequestType = 'incident';
+			}
+			else
+			{
+				$sRequestType = $oTicket->Get('request_type');
+			}
+
+			$aArgs = $oTicket->ToArgs();
+			$aArgs['metric'] = $sMetric;
+			$aArgs['request_type'] = $sRequestType;
+
+			//echo "<p>Managing:".$sMetric."-".$this->Get('request_type')."-".$this->Get('importance')."</p>\n";
+			$oSLTSet = new DBObjectSet(DBObjectSearch::FromOQL(RESPONSE_TICKET_SLT_QUERY),
+						array(),
+						$aArgs
+						);
+
+			$iMinDuration = PHP_INT_MAX;
+			$sSLTName = '';
+
+			while($oSLT = $oSLTSet->Fetch())
+			{
+				$iDuration = (int)$oSLT->Get('value');
+				$sUnit = $oSLT->Get('unit');
+				switch($sUnit)
+				{
+					case 'days':
+					$iDuration = $iDuration * 24; // 24 hours in 1 days
+					// Fall though
+
+					case 'hours':
+					$iDuration = $iDuration * 60; // 60 minutes in 1 hour
+					// Fall though
+
+					case 'minutes':
+					$iDuration = $iDuration * 60;
+				}
+				if ($iDuration < $iMinDuration)
+				{
+					$iMinDuration = $iDuration;
+					$sSLTName = $oSLT->GetName();
+				}
+			}
+			if ($iMinDuration == PHP_INT_MAX)
+			{
+				$iDeadline = null;
+			}
+			else
+			{
+				// Store $sSLTName to keep track of which SLT has been used
+				$iDeadline = $iMinDuration;
+			}
+		}
+		return $iDeadline;
+
+	}
+}
+
+/**
+ * Compute the TTO of a ticket - null if the class 'SLT' does not exist
+ */
+class ResponseTicketTTO extends ResponseTicketSLT implements iMetricComputer
+{
+	public static function GetDescription()
+	{
+		return "Time to own a ticket";
+	}
+
+	public function ComputeMetric($oObject)
+	{
+		$iRes = $this->ComputeSLT($oObject, 'TTO');
+		return $iRes;
+	}
+}
+
+/**
+ * Compute the TTR of a ticket - null if the class 'SLT' does not exist
+ */
+class ResponseTicketTTR extends ResponseTicketSLT implements iMetricComputer
+{
+	public static function GetDescription()
+	{
+		return "Time to resolve a ticket";
+	}
+
+	public function ComputeMetric($oObject)
+	{
+		$iRes = $this->ComputeSLT($oObject, 'TTR');
+		return $iRes;
+	}
+}
+
+
+class _Ticket extends cmdbAbstractObject
+{
+
+	public function UpdateImpactedItems()
+	{
+		require_once(APPROOT.'core/displayablegraph.class.inc.php');
+
+		/** @var ormLinkSet $oContactsSet */
+		$oContactsSet = $this->Get('contacts_list');
+		/** @var ormLinkSet $oCIsSet */
+		$oCIsSet = $this->Get('functionalcis_list');
+
+		$aCIsToImpactCode = array();
+		$aSources = array();
+		$aExcluded = array();
+    	foreach ($oCIsSet as $oLink)
+		{
+			$iKey = $oLink->Get('functionalci_id');
+			$aCIsToImpactCode[$iKey] = array('link' => $oLink->GetKey(), 'code' => $oLink->Get('impact_code'));
+			if ($oLink->Get('impact_code') == 'manual')
+			{
+				$oObj = MetaModel::GetObject('FunctionalCI', $iKey);
+				$aSources[$iKey] = $oObj;
+			}
+			else if ($oLink->Get('impact_code') == 'not_impacted')
+			{
+				$oObj = MetaModel::GetObject('FunctionalCI', $iKey);
+				$aExcluded[] = $oObj;
+			}
+		}
+
+		$aContactsToRoleCode = array();
+		foreach ($oContactsSet as $oLink)
+		{
+			$iKey = $oLink->Get('contact_id');
+            $aContactsToRoleCode[$iKey] = array('link' => $oLink->GetKey(), 'code' => $oLink->Get('role_code'));
+			if ($oLink->Get('role_code') == 'do_not_notify')
+			{
+				$oObj = MetaModel::GetObject('Contact', $iKey);
+				$aExcluded[] = $oObj;
+			}
+		}
+		
+		$sContextKey = 'itop-tickets/relation_context/'.get_class($this).'/impacts/down';
+		$aContextDefs = DisplayableGraph::GetContextDefinitions($sContextKey, true, array('this' => $this));
+		$aDefaultContexts = array();
+		foreach($aContextDefs as $sKey => $aDefinition)
+		{
+			// Add the default context queries to the computation
+			if (array_key_exists('default', $aDefinition) && ($aDefinition['default'] == 'yes'))
+			{
+				$aDefaultContexts[] = $aDefinition['oql'];
+			}
+		}
+		// Merge the directly impacted items with the "new" ones added by the "context" queries
+        $aGraphObjects = array();
+        $oRawGraph = MetaModel::GetRelatedObjectsDown('impacts', $aSources, 10, true /* bEnableRedundancy */, $aExcluded);
+        $oIterator = new RelationTypeIterator($oRawGraph, 'Node');
+        foreach ($oIterator as $oNode)
+        {
+            // Any object node reached AND different from a source will do
+            if ( ($oNode instanceof RelationObjectNode) && ($oNode->GetProperty('is_reached')) && (!$oNode->GetProperty('source')) )
+            {
+                $this->StoreComputedObject($aGraphObjects, $oNode->GetProperty('object'));
+            }
+        }
+        if (count($aDefaultContexts) > 0)
+		{
+			$oAnnotatedGraph = MetaModel::GetRelatedObjectsDown('impacts', $aSources, 10, true /* bEnableRedundancy */, $aExcluded, $aDefaultContexts);
+			$oIterator = new RelationTypeIterator($oAnnotatedGraph, 'Node');
+			foreach ($oIterator as $oNode)
+			{
+                // Only pick the nodes which are NOT impacted by a context root cause, and merge them in the list
+                if (($oNode instanceof RelationObjectNode) && ($oNode->GetProperty('is_reached')) && (!$oNode->GetProperty('source')) && ($oNode->GetProperty('context_root_causes', null) == null))
+                {
+                    $this->StoreComputedObject($aGraphObjects, $oNode->GetProperty('object'));
+                }
+			}
+		}
+
+		// Remove unnecessary "computed" CIs and Contacts
+        foreach($aCIsToImpactCode as $iKey => $aCode)
+        {
+            if (($aCode['code'] == 'computed') && (!isset($aGraphObjects['FunctionalCI']) || (!array_key_exists($iKey, $aGraphObjects['FunctionalCI']))))
+            {
+                $oCIsSet->RemoveItem($aCode['link']);
+            }
+        }
+        foreach($aContactsToRoleCode as $iKey => $aCode)
+        {
+            if (($aCode['code'] == 'computed') && (!isset($aGraphObjects['Contact']) || (!array_key_exists($iKey, $aGraphObjects['Contact']))))
+            {
+                $oContactsSet->RemoveItem($aCode['link']);
+            }
+        }
+
+        // Add new nodes
+		foreach ($aGraphObjects as $sRootClass => $aObjects)
+		{
+			switch ($sRootClass)
+			{
+				case 'FunctionalCI':
+				// Only FunctionalCIs which are not already linked to the ticket
+                foreach($aObjects as $iKey => $oObj)
+                {
+                    if (!array_key_exists($iKey, $aCIsToImpactCode))
+                    {
+                        $oNewLink = new lnkFunctionalCIToTicket();
+                        $oNewLink->Set('functionalci_id', $iKey);
+                        $oNewLink->Set('impact_code', 'computed');
+                        $oCIsSet->AddItem($oNewLink);
+                    }
+                }
+				break;
+
+				case 'Contact':
+				// Only link Contacts which are not already linked to the ticket
+                foreach($aObjects as $iKey => $oObj)
+                {
+                    if (!array_key_exists($iKey, $aContactsToRoleCode))
+                    {
+                        $oNewLink = new lnkContactToTicket();
+                        $oNewLink->Set('contact_id', $iKey);
+                        $oNewLink->Set('role_code', 'computed');
+                        $oContactsSet->AddItem($oNewLink);
+                    }
+                }
+				break;
+			}
+		}
+		$this->Set('functionalcis_list', $oCIsSet);
+		$this->Set('contacts_list', $oContactsSet);
+	}
+
+	private function StoreComputedObject(&$aGraphObjects, $oObj)
+    {
+        $iKey = $oObj->GetKey();
+        $sRootClass = MetaModel::GetRootClass(get_class($oObj));
+        $aGraphObjects[$sRootClass][$iKey] = $oObj;
+    }
+
+	public function DisplayBareRelations(WebPage $oPage, $bEditMode = false)
+	{
+		parent::DisplayBareRelations($oPage, $bEditMode);
+		// Display the impact analysis for tickets not in 'closed' or 'resolved' status... and not in edition
+		if ((!$bEditMode) && (!in_array($this->Get('status'), array('resolved', 'closed'))))
+		{
+			$oPage->add_linked_script(utils::GetAbsoluteUrlAppRoot().'js/fraphael.js');
+			$oPage->add_linked_stylesheet(utils::GetAbsoluteUrlAppRoot().'css/jquery.contextMenu.css');
+			$oPage->add_linked_script(utils::GetAbsoluteUrlAppRoot().'js/jquery.contextMenu.js');
+			$oPage->add_linked_script(utils::GetAbsoluteUrlAppRoot().'js/simple_graph.js');
+			$oPage->AddAjaxTab(Dict::S('Ticket:ImpactAnalysis'), utils::GetAbsoluteUrlAppRoot().'pages/ajax.render.php?operation=ticket_impact&class='.get_class($this).'&id='.$this->GetKey(), true);
+		}
+	}
+}
 ?>
\ No newline at end of file