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*********** Exception occurred ************ Tue Apr 09 13:45:09 CEST 2002: java.lang.NullPointerException: <no message> java.lang.NullPointerException at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.netbeans.modules.xml.tree.editor.TreeEditorComponent.co mponentActivated(TreeEditorComponent.java:246) at org.openide.windows.WindowManager.activateComponent (WindowManager.java:157) at org.netbeans.core.windows.WindowManagerImpl.activateCompone nt(WindowManagerImpl.java:717) at org.netbeans.core.windows.frames.DefaultContainerImpl.doAct ivateComponent(DefaultContainerImpl.java:555) at org.netbeans.core.windows.frames.DefaultContainerImpl.react ivateSelectedComponent(DefaultContainerImpl.java:730) at org.netbeans.core.windows.frames.SplitContainerImpl.stateCh anged(SplitContainerImpl.java:629) at javax.swing.JTabbedPane.fireStateChanged (JTabbedPane.java:290) at javax.swing.JTabbedPane$ModelListener.stateChanged (JTabbedPane.java:222) at javax.swing.DefaultSingleSelectionModel.fireStateChanged (DefaultSingleSelectionModel.java:116) at javax.swing.DefaultSingleSelectionModel.setSelectedIndex (DefaultSingleSelectionModel.java:50) at javax.swing.JTabbedPane.setSelectedIndexImpl (JTabbedPane.java:467) at javax.swing.JTabbedPane.setSelectedIndex (JTabbedPane.java:460) at javax.swing.JTabbedPane.insertTab (JTabbedPane.java:572) at javax.swing.JTabbedPane.addTab (JTabbedPane.java:606) at org.netbeans.core.windows.frames.SplitContainerImpl.compone ntAdded(SplitContainerImpl.java:403) at org.netbeans.core.windows.frames.DefaultContainerImpl.addTo pComponent(DefaultContainerImpl.java:278) at org.netbeans.core.windows.ModeImpl.addToContainer (ModeImpl.java:1780) at org.netbeans.core.windows.ModeImpl.access$400 (ModeImpl.java:77) at org.netbeans.core.windows.ModeImpl$1.performCommand (ModeImpl.java:396) at org.netbeans.core.windows.DeferredPerformer.processCommand (DeferredPerformer.java:186) at org.netbeans.core.windows.DeferredPerformer.putRequest (DeferredPerformer.java:83) at org.netbeans.core.windows.ModeImpl.dockInto (ModeImpl.java:377) at org.netbeans.core.windows.ModeImpl.dockInto (ModeImpl.java:357) at org.netbeans.core.windows.ModeImpl.dockInto (ModeImpl.java:345) at org.netbeans.core.windows.WindowManagerImpl$TopComponentMan ager.doOpen(WindowManagerImpl.java:1451) at org.netbeans.core.windows.WindowManagerImpl$TopComponentMan ager.open(WindowManagerImpl.java:1408) at org.openide.windows.TopComponent.open (TopComponent.java:212) at org.openide.text.CloneableEditor.open (CloneableEditor.java:278) at org.netbeans.core.windows.layers.TCRefImpl.performCommand (TCRefImpl.java:163) at org.netbeans.core.windows.DeferredPerformer.processCommand (DeferredPerformer.java:186) at org.netbeans.core.windows.DeferredPerformer.putRequest (DeferredPerformer.java:83) at org.netbeans.core.windows.layers.TCRefImpl.updateMode (TCRefImpl.java:206) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.addCo mponents(ModeData.java:764) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updat eComponents(ModeData.java:629) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.loadD ataSection(ModeData.java:1090) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updat eProperties(ModeData.java:487) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updat eAll(ModeData.java:397) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.creat eInstance(ModeData.java:341) [catch] at org.netbeans.core.windows.layers.ICFolderImpl$R.run (ICFolderImpl.java:261) at org.netbeans.core.windows.layers.ICFolderImpl.instanceCreat e(ICFolderImpl.java:123) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCook ieImpl.createModes(WorkspaceData.java:470) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCook ieImpl.updateModes(WorkspaceData.java:407) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCook ieImpl.updateAll(WorkspaceData.java:342) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCook ieImpl.loadDataSection(WorkspaceData.java:667) at org.netbeans.core.windows.WorkspaceImpl.ensureSectionLoaded (WorkspaceImpl.java:958) at org.netbeans.core.windows.WorkspaceImpl.setVisible (WorkspaceImpl.java:687) at org.netbeans.core.windows.WindowManagerImpl$1.run (WindowManagerImpl.java:431) at org.netbeans.core.windows.WindowManagerImpl.setCurrentWorks pace(WindowManagerImpl.java:392) at org.netbeans.core.windows.WorkspaceImpl.activate (WorkspaceImpl.java:463) at org.netbeans.modules.form.FormEditorSupport.activateWorkspa ce(FormEditorSupport.java:463) at org.netbeans.modules.form.FormEditorSupport.access$200 (FormEditorSupport.java:37) at org.netbeans.modules.form.FormEditorSupport$1.run (FormEditorSupport.java:113) at java.awt.event.InvocationEvent.dispatch (InvocationEvent.java:178) at java.awt.EventQueue.dispatchEvent (EventQueue.java:443) at java.awt.EventDispatchThread.pumpOneEventForHierarchy (EventDispatchThread.java:190) at java.awt.EventDispatchThread.pumpEventsForHierarchy (EventDispatchThread.java:144) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:138) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:130) at java.awt.EventDispatchThread.run (EventDispatchThread.java:98) java.io.IOException: Instance creation failed. at org.netbeans.core.windows.layers.ICFolderImpl.instanceCreat e(ICFolderImpl.java:131) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCook ieImpl.createModes(WorkspaceData.java:470) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCook ieImpl.updateModes(WorkspaceData.java:407) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCook ieImpl.updateAll(WorkspaceData.java:342) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCook ieImpl.loadDataSection(WorkspaceData.java:667) at org.netbeans.core.windows.WorkspaceImpl.ensureSectionLoaded (WorkspaceImpl.java:958) at org.netbeans.core.windows.WorkspaceImpl.setVisible (WorkspaceImpl.java:687) at org.netbeans.core.windows.WindowManagerImpl$1.run (WindowManagerImpl.java:431) at org.netbeans.core.windows.WindowManagerImpl.setCurrentWorks pace(WindowManagerImpl.java:392) at org.netbeans.core.windows.WorkspaceImpl.activate (WorkspaceImpl.java:463) at org.netbeans.modules.form.FormEditorSupport.activateWorkspa ce(FormEditorSupport.java:463) at org.netbeans.modules.form.FormEditorSupport.access$200 (FormEditorSupport.java:37) at org.netbeans.modules.form.FormEditorSupport$1.run (FormEditorSupport.java:113) at java.awt.event.InvocationEvent.dispatch (InvocationEvent.java:178) at java.awt.EventQueue.dispatchEvent (EventQueue.java:443) at java.awt.EventDispatchThread.pumpOneEventForHierarchy (EventDispatchThread.java:190) at java.awt.EventDispatchThread.pumpEventsForHierarchy (EventDispatchThread.java:144) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:138) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:130) at java.awt.EventDispatchThread.run (EventDispatchThread.java:98) *********** Exception occurred ************ Tue Apr 09 13:45:11 CEST 2002: java.lang.NullPointerException: <no message> java.lang.NullPointerException at org.netbeans.modules.form.FormDesigner.updateWholeDesigner (FormDesigner.java:582) at org.netbeans.modules.form.FormDesigner.initialize (FormDesigner.java:94) at org.netbeans.modules.form.FormEditorSupport.openGUI (FormEditorSupport.java:486) at org.netbeans.modules.form.FormEditorSupport.access$400 (FormEditorSupport.java:37) at org.netbeans.modules.form.FormEditorSupport$1.run (FormEditorSupport.java:118) at java.awt.event.InvocationEvent.dispatch (InvocationEvent.java:178) at java.awt.EventQueue.dispatchEvent (EventQueue.java:443) [catch] at java.awt.EventDispatchThread.pumpOneEventForHierarchy (EventDispatchThread.java:190) at java.awt.EventDispatchThread.pumpEventsForHierarchy (EventDispatchThread.java:144) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:138) at java.awt.EventDispatchThread.pumpEvents (EventDispatchThread.java:130) at java.awt.EventDispatchThread.run (EventDispatchThread.java:98)
First exception is probably issue in jdk. Which version of jdk are you using? The second one can be explained in form module.
The exception looks suspiciously similar to that from issue 21692. However, I still have no idea how it could happen... *** This issue has been marked as a duplicate of 21692 ***
Resolved for 3.3.x or earlier, no new info since then -> closing.