Java Error When opening ER Model in Jdev 11g release 2

Dear All,
I m getting below error when opening my ER model in jDev
java.lang.IllegalArgumentException: Ref is null
     at oracle.modeler.dif.ModelerGraphicBridge.findBridgeFromRef(ModelerGraphicBridge.java:343)
     at oracle.modeler.dif.ModelerGraphicBridge.createEdgeGraphic(ModelerGraphicBridge.java:267)
     at oracle.modeler.dif.ModelerGraphicBridge.createEdgeGraphic(ModelerGraphicBridge.java:86)
     at oracle.diagram.dif.GraphEdge.createGraphic(GraphEdge.java:152)
     at oracle.diagram.dif.GraphElement.createContainedGraphics(GraphElement.java:213)
     at oracle.modeler.shape.config.DefaultDiagramGraphicBridge.createDiagramGraphic(DefaultDiagramGraphicBridge.java:122)
     at oracle.modeler.dif.ModelerGraphicBridge.createDiagramGraphic(ModelerGraphicBridge.java:250)
     at oracle.modeler.dif.ModelerGraphicBridge.createDiagramGraphic(ModelerGraphicBridge.java:86)
     at oracle.diagram.dif.Diagram.createGraphic(Diagram.java:152)
     at oracle.diagram.dif.Diagram.createGraphic(Diagram.java:141)
     at oracle.modeler.dif.ModelerGraphicBridge.getGrapher(ModelerGraphicBridge.java:426)
     at oracle.modeler.dif.ModelerGraphicBridge.getGrapher(ModelerGraphicBridge.java:367)
     at oracle.modeler.addin.ModelerNode.findOrCreateManager(ModelerNode.java:252)
     at oracle.modeler.addin.ModelerDiagram.findOrCreateGraphSystemFromContext(ModelerDiagram.java:358)
     at oracle.diagram.framework.editor.CommonDiagram.open(CommonDiagram.java:231)
     at oracle.modeler.addin.ModelerDiagram.open(ModelerDiagram.java:111)
     at oracle.diagram.framework.editor.IdeDiagramEditor.openDiagram(IdeDiagramEditor.java:323)
     at oracle.diagram.framework.editor.IdeDiagramEditor.openImpl(IdeDiagramEditor.java:273)
     at oracle.modeler.addin.ModelerEditor.openImpl(ModelerEditor.java:79)
     at oracle.ide.editor.AsynchronousEditor.contextAvailable(AsynchronousEditor.java:427)
     at oracle.ide.editor.AsynchronousEditor.updateContextImpl(AsynchronousEditor.java:411)
     at oracle.ide.editor.AsynchronousEditor.setDelayedContext(AsynchronousEditor.java:395)
     at oracle.ide.editor.AsynchronousEditor$3$1.run(AsynchronousEditor.java:362)
     at oracle.bali.ewt.util.PaintUtils.invokeAfterRepaint(PaintUtils.java:53)
     at oracle.javatools.util.SwingUtils.invokeAfterRepaint(SwingUtils.java:607)
     at oracle.ide.editor.AsynchronousEditor$7.run(AsynchronousEditor.java:563)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
     at java.awt.EventQueue.access$000(EventQueue.java:85)
     at java.awt.EventQueue$1.run(EventQueue.java:603)
     at java.awt.EventQueue$1.run(EventQueue.java:601)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
     at oracle.javatools.internal.ui.EventQueueWrapper._dispatchEvent(EventQueueWrapper.java:169)
     at oracle.javatools.internal.ui.EventQueueWrapper.dispatchEvent(EventQueueWrapper.java:151)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Thanks

User,
As you did not give any other information other then the stack trace it's heard to help. Does this error show a dialog box which asks you if want to save your work and exit or save and continue?
Where was the ER diagram created?
Timo
Edited by: Timo Hahn on 20.05.2012 17:10

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