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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.componentActivated(TreeEditorComponent.java:246) at org.openide.windows.WindowManager.activateComponent(WindowManager.java:157) at org.netbeans.core.windows.WindowManagerImpl.activateComponent(WindowManagerImpl.java:717) at org.netbeans.core.windows.frames.DefaultContainerImpl.doActivateComponent(DefaultContainerImpl.java:555) at org.netbeans.core.windows.frames.DefaultContainerImpl.reactivateSelectedComponent(DefaultContainerImpl.java:730) at org.netbeans.core.windows.frames.SplitContainerImpl.stateChanged(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.componentAdded(SplitContainerImpl.java:403) at org.netbeans.core.windows.frames.DefaultContainerImpl.addTopComponent(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$1.performCommand(ModeImpl.java:396) at org.netbeans.core.windows.DeferredPerformer.processCommand(DeferredPerformer.java:186) at org.netbeans.core.windows.DeferredPerformer.putRequest(DeferredPerformer.java:83) at org.netbeans.core.windows.ModeImpl.dockInto(ModeImpl.java:377) at org.netbeans.core.windows.ModeImpl.dockInto(ModeImpl.java:357) at org.netbeans.core.windows.ModeImpl.dockInto(ModeImpl.java:345) at org.netbeans.core.windows.WindowManagerImpl$TopComponentManager.doOpen(WindowManagerImpl.java:1451) at org.netbeans.core.windows.WindowManagerImpl$TopComponentManager.open(WindowManagerImpl.java:1408) at org.openide.windows.TopComponent.open(TopComponent.java:212) at org.openide.text.CloneableEditor.open(CloneableEditor.java:278) at org.netbeans.core.windows.layers.TCRefImpl.performCommand(TCRefImpl.java:163) at org.netbeans.core.windows.DeferredPerformer.processCommand(DeferredPerformer.java:186) at org.netbeans.core.windows.DeferredPerformer.putRequest(DeferredPerformer.java:83) at org.netbeans.core.windows.layers.TCRefImpl.updateMode(TCRefImpl.java:206) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.addComponents(ModeData.java:764) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateComponents(ModeData.java:629) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.loadDataSection(ModeData.java:1090) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateProperties(ModeData.java:487) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateAll(ModeData.java:397) at org.netbeans.core.windows.layers.ModeData$CookiesImpl.createInstance(ModeData.java:341)[catch] at org.netbeans.core.windows.layers.ICFolderImpl$R.run(ICFolderImpl.java:261) at org.netbeans.core.windows.layers.ICFolderImpl.instanceCreate(ICFolderImpl.java:123) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.createModes(WorkspaceData.java:470) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateModes(WorkspaceData.java:407) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateAll(WorkspaceData.java:342) at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.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.setCurrentWorkspace(WindowManagerImpl.java:392) at org.netbeans.core.windows.WorkspaceImpl.activate(WorkspaceImpl.java:463) at org.netbeans.modules.form.FormEditorSupport.activateWorkspace(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)