javax.jmi.reflect.InvalidObjectException: Object with MOFID 611B43A2-A907-11D8-B66B-A3FDC21EAA77:0000000000000245 no longer exists.
	at org.netbeans.mdr.handlers.BaseObjectHandler._getDelegate(BaseObjectHandler.java:322)
	at org.netbeans.mdr.handlers.InstanceHandler.getInstanceDelegate(InstanceHandler.java:48)
	at org.netbeans.mdr.handlers.InstanceHandler._immediateComposite(InstanceHandler.java:251)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement._immediateComposite(MetadataElement.java:1222)
	at org.netbeans.mdr.handlers.InstanceHandler.refImmediateComposite(InstanceHandler.java:243)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement.getResource(MetadataElement.java:451)
	at org.netbeans.jmi.javamodel.MultipartId$Impl.getResource(Unknown Source)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement.testResourceChange(MetadataElement.java:797)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement.getPosition(MetadataElement.java:432)
	at org.netbeans.modules.javacore.JMManager.getElementPosition(JMManager.java:263)
	at org.netbeans.modules.refactoring.WhereUsedElement.getPosition(WhereUsedElement.java:155)
	at org.netbeans.modules.refactoring.RefactoringSupportImpl.extractCES(RefactoringSupportImpl.java:78)
	at org.netbeans.modules.refactoring.RefactoringSupportImpl.watch(RefactoringSupportImpl.java:88)
	at org.netbeans.modules.refactoring.ui.RefactoringPanel.refresh(RefactoringPanel.java:361)
	at org.netbeans.modules.refactoring.ui.RefactoringPanel.<init>(RefactoringPanel.java:81)
[catch] at org.netbeans.api.refactoring.ui.AbstractRefactoringAction.run(AbstractRefactoringAction.java:121)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)