diff --git a/application/wizardhelper.class.inc.php b/application/wizardhelper.class.inc.php
index b6eb2927b..14e61ea5c 100644
--- a/application/wizardhelper.class.inc.php
+++ b/application/wizardhelper.class.inc.php
@@ -198,7 +198,15 @@ class WizardHelper
 	
 	public function GetIdForField($sFieldName)
 	{
-		return $this->m_aData['m_oFieldsMap'][$sFieldName];
+		$sResult = '';
+		// It may happen that the field we'd like to update does not
+		// exist in the form. For example, if the field should be hidden/read-only
+		// in the current state of the object
+		if (isset($this->m_aData['m_oFieldsMap'][$sFieldName]))
+		{
+			$sResult = $this->m_aData['m_oFieldsMap'][$sFieldName];
+		}
+		return $sResult;
 	}
 	
 	static function ParseJsonSet($oMe, $sLinkClass, $sExtKeyToMe, $sJsonSet)
diff --git a/business/KEDB.business.php b/business/KEDB.business.php
index 5edf8a823..8a04bc432 100644
--- a/business/KEDB.business.php
+++ b/business/KEDB.business.php
@@ -95,8 +95,7 @@ class lnkInfraError extends cmdbAbstractObject
 
 	
 }
-if (false)
-{
+
 ////////////////////////////////////////////////////////////////////////////////////
 /**
 * n-n link between any Contract and a Document
@@ -131,6 +130,5 @@ class lnkDocumentError extends cmdbAbstractObject
 		MetaModel::Init_SetZListItems('list', array('doc_id', 'error_name', 'link_type')); // Attributes to be displayed for a list
 	}
 }
-}
 
 ?>
diff --git a/core/attributedef.class.inc.php b/core/attributedef.class.inc.php
index 44738b110..2ea114bfd 100644
--- a/core/attributedef.class.inc.php
+++ b/core/attributedef.class.inc.php
@@ -1268,7 +1268,7 @@ class AttributeDateTime extends AttributeDBField
 }
 
 // Init static constant once for all (remove when PHP allows real static const)
-AttributeDate::InitStatics();
+AttributeDateTime::InitStatics();
 
 
 /**
diff --git a/js/jquery.popupmenu.js b/js/jquery.popupmenu.js
index dbdabb5d1..fe27e70f7 100644
--- a/js/jquery.popupmenu.js
+++ b/js/jquery.popupmenu.js
@@ -18,7 +18,6 @@ jQuery.fn.popupmenu = function ()
 	{
 		$(this).bind('mouseenter.popup_menu click.popup_menu', function (evt)
 		{
-			console.log(evt.type);
 			var previous_popup = popupmenu;
 			var bMenuClosed = false;
 			popupmenu = $(this).find('ul');
diff --git a/pages/ajax.render.php b/pages/ajax.render.php
index a3d1e8e2d..58380c3ad 100644
--- a/pages/ajax.render.php
+++ b/pages/ajax.render.php
@@ -88,12 +88,18 @@ switch($operation)
 	foreach($oWizardHelper->GetFieldsForAllowedValues() as $sAttCode)
 	{
 		$sId = $oWizardHelper->GetIdForField($sAttCode);
-		$value = $oObj->Get($sAttCode);
-		$displayValue = $oObj->GetEditValue($sAttCode);
-		$oAttDef = MetaModel::GetAttributeDef($sClass, $sAttCode);
-		$sHTMLValue = cmdbAbstractObject::GetFormElementForField($oPage, $sClass, $sAttCode, $oAttDef, $value, $displayValue, $sId, '', 0, array('this' => $oObj));
-
-		$oWizardHelper->SetAllowedValuesHtml($sAttCode, $sHTMLValue);
+		if ($sId != '')
+		{
+			// It may happen that the field we'd like to update does not
+			// exist in the form. For example, if the field should be hidden/read-only
+			// in the current state of the object
+			$value = $oObj->Get($sAttCode);
+			$displayValue = $oObj->GetEditValue($sAttCode);
+			$oAttDef = MetaModel::GetAttributeDef($sClass, $sAttCode);
+			$sHTMLValue = cmdbAbstractObject::GetFormElementForField($oPage, $sClass, $sAttCode, $oAttDef, $value, $displayValue, $sId, '', 0, array('this' => $oObj));
+	
+			$oWizardHelper->SetAllowedValuesHtml($sAttCode, $sHTMLValue);
+		}
 	}
 	$oPage->add("<script type=\"text/javascript\">\noWizardHelper.m_oData=".$oWizardHelper->ToJSON().";\noWizardHelper.UpdateFields();\n</script>\n");
 	break;