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Build: NetBeans IDE 6.9 (Build 201006101454) VM: Java HotSpot(TM) 64-Bit Server VM, 17.0-b17, Java(TM) SE Runtime Environment, 1.6.0_21-b07 OS: Windows Server 2008 R2 User Comments: GUEST: Closed UML project and reopened brichacekz: The error occurred after while opening UML project. sunbiz: 1.) Created UML Project 2.) Created Class Diagram 3.) Added Element Class - 'Person' 4.) Added 2 more Elements inside Person - 'Patient', 'User' 5.) Saved the Class Diagram and Closed the project 6.) Re-opened the project and got this exception Stacktrace: java.lang.AssertionError at org.netbeans.modules.uml.drawingarea.UMLDiagramTopComponent.<init>(UMLDiagramTopComponent.java:261) at org.netbeans.modules.uml.drawingarea.UMLDiagramManager.showDiagram(UMLDiagramManager.java:514) at org.netbeans.modules.uml.drawingarea.UMLDiagramManager.openDiagram(UMLDiagramManager.java:138) at org.netbeans.modules.uml.drawingarea.dataobject.UMLDiagramEditorSupport.openDiagramEditor(UMLDiagramEditorSupport.java:91) at org.netbeans.modules.uml.drawingarea.dataobject.UMLDiagramDataObject$OpenViewEdit.open(UMLDiagramDataObject.java:158) at org.netbeans.modules.uml.drawingarea.dataobject.UMLDiagramDataObject$OpenViewEdit.edit(UMLDiagramDataObject.java:170)
Created attachment 101570 [details] stacktrace