Index: /Scheduling/trunk/cs/bsdx0200GUISourceCode/DManagement.cs
===================================================================
--- /Scheduling/trunk/cs/bsdx0200GUISourceCode/DManagement.cs	(revision 1512)
+++ /Scheduling/trunk/cs/bsdx0200GUISourceCode/DManagement.cs	(revision 1513)
@@ -1820,6 +1820,7 @@
 
 				m_sResourceGroupName = sResGroupName;
+                m_dsGlobal.Tables["GroupResources"].Clear(); //must be cleared first as it has a relationship to ResourceGroup
+                m_dsGlobal.Tables["ResourceGroup"].Clear();
 				m_DocManager.LoadResourceGroupTable();
-				m_dsGlobal.Tables["GroupResources"].Clear();
 				m_DocManager.LoadGroupResourcesTable();