Index: main/sd/source/ui/animations/CustomAnimationDialog.cxx
===================================================================
--- main/sd/source/ui/animations/CustomAnimationDialog.cxx	(revision 1344577)
+++ main/sd/source/ui/animations/CustomAnimationDialog.cxx	(working copy)
@@ -2387,15 +2387,20 @@
 				pSet->setPropertyValue( nHandleTextGroupingAuto, makeAny( fTextGroupingAuto ) );
 		}
 	}
+	//bug 120049
+	//[crash] Aoo crash when modify the "Random effects" animation effect's trigger condition to "Start effect on click of" .
+	//If this control is disabled, we should ignore its value
+	if (maCBXAnimateForm.IsEnabled())
+	{
+		sal_Bool bAnimateForm = maCBXAnimateForm.IsChecked();
+		sal_Bool bOldAnimateForm = !bAnimateForm;
 
-	sal_Bool bAnimateForm = maCBXAnimateForm.IsChecked();
-	sal_Bool bOldAnimateForm = !bAnimateForm;
+		if(mpSet->getPropertyState( nHandleAnimateForm ) != STLPropertyState_AMBIGUOUS)
+			mpSet->getPropertyValue( nHandleAnimateForm ) >>= bOldAnimateForm;
 
-	if(mpSet->getPropertyState( nHandleAnimateForm ) != STLPropertyState_AMBIGUOUS)
-		mpSet->getPropertyValue( nHandleAnimateForm ) >>= bOldAnimateForm;
-
-	if( bAnimateForm != bOldAnimateForm )
-		pSet->setPropertyValue( nHandleAnimateForm, makeAny( bAnimateForm ) );
+		if( bAnimateForm != bOldAnimateForm )
+			pSet->setPropertyValue( nHandleAnimateForm, makeAny( bAnimateForm ) );
+	}
 }
 
 void CustomAnimationTextAnimTabPage::updateControlStates()