Index: inc/document.hxx
===================================================================
--- inc/document.hxx	(revision 1552212)
+++ inc/document.hxx	(working copy)
@@ -503,6 +503,7 @@
 	ScFieldEditEngine*	CreateFieldEditEngine();
 	void				DisposeFieldEditEngine(ScFieldEditEngine*& rpEditEngine);
 
+	// Note: the returned ScRangeName is volatile, and it can be changed at any time.
 	SC_DLLPUBLIC ScRangeName*	GetRangeName();
 	void			SetRangeName( ScRangeName* pNewRangeName );
 	SCTAB			GetMaxTableNumber() { return nMaxTableNumber; }
Index: source/core/data/documen3.cxx
===================================================================
--- source/core/data/documen3.cxx	(revision 1552212)
+++ source/core/data/documen3.cxx	(working copy)
@@ -95,6 +95,9 @@
 
 void ScDocument::SetRangeName( ScRangeName* pNewRangeName )
 {
+	if (pRangeName == pNewRangeName)
+		return;
+
 	if (pRangeName)
 		delete pRangeName;
 	pRangeName = pNewRangeName;
Index: source/ui/unoobj/nameuno.cxx
===================================================================
--- source/ui/unoobj/nameuno.cxx	(revision 1552212)
+++ source/ui/unoobj/nameuno.cxx	(working copy)
@@ -160,7 +160,7 @@
 								newNameScope = nameScope;
 							//end of add
 
-                            ScRangeName* pNewRanges = new ScRangeName( *pNames );
+                            //ScRangeName* pNewRanges = new ScRangeName( *pNames );
                             ScRangeData* pOld = (*pNames)[nPos];
 
                             String aInsName(pOld->GetName());
@@ -185,11 +185,11 @@
                             pNew->SetIndex( pOld->GetIndex() );
                             pNew->SetRangeScope(newNameScope);
 						   	
-                            pNewRanges->AtFree( nPos );
-                            if ( pNewRanges->Insert(pNew) )
+                            pNames->AtFree( nPos );
+                            if ( pNames->Insert(pNew) )
                             {
                                  ScDocFunc aFunc(*pDocShell);
-                                 aFunc.SetNewRangeNames( pNewRanges, sal_True );
+                                 aFunc.SetNewRangeNames( pNames, sal_True );
                                  aName = aInsName;	//! broadcast?
                                  aScopeName = pNewScopeName ? *pNewScopeName : aScopeName;
                             }
@@ -196,7 +196,7 @@
                             else
                             {
                                  delete pNew;		//! uno::Exception/Fehler oder so
-                                 delete pNewRanges;
+                                 //delete pNewRanges;
                             }
                        }
               }
@@ -596,7 +596,7 @@
 	       String aContStr(aContent);
 		if (pNames && !pNames->SearchName(aNameStr, nIndex,aScope))
 		{
-                   ScRangeName* pNewRanges = new ScRangeName( *pNames );
+                   //ScRangeName* pNewRanges = new ScRangeName( *pNames );
             // GRAM_PODF_A1 for API compatibility.
                    ScRangeData* pNew = new ScRangeData( pDoc, aNameStr, aContStr,
 												aPos, nNewType,formula::FormulaGrammar::GRAM_PODF_A1 );//GRAM_ODFF,//
@@ -603,16 +603,16 @@
 
                    pNew->SetRangeScope(aScope);
 			
-                   if ( pNewRanges->Insert(pNew) )
+                   if ( pNames->Insert(pNew) )
                    {
 				ScDocFunc aFunc(*pDocShell);
-                            aFunc.SetNewRangeNames( pNewRanges, sal_True );
+                            aFunc.SetNewRangeNames( pNames, sal_True );
 				bDone = true;
                    }
                    else
                    {
 				delete pNew;
-                            delete pNewRanges;
+                            //delete pNewRanges;
                    }
 		}
 	}