Annotation: Component null could not be saved due to problems with its serialization.
java.lang.reflect.InvocationTargetException
        at java.awt.EventQueue.invokeAndWait(EventQueue.java:818)
        at javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1207)
        at org.netbeans.core.windows.WindowManagerImpl$ProjectSwitchListener.propertyChange(WindowManagerImpl.java:1371)
        at org.netbeans.core.projects.SessionManager.firePropertyChange(SessionManager.java:212)
        at org.netbeans.core.projects.SessionManager.close(SessionManager.java:169)
        at org.netbeans.core.NbTopManager.exit(NbTopManager.java:564)
        at org.netbeans.core.NbTopManager$NbLifecycleManager.exit(NbTopManager.java:590)
        at org.netbeans.core.actions.SystemExit.run(SystemExit.java:61)
        at org.openide.util.Task.run(Task.java:136)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:328)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:668)
Caused by: java.lang.ArrayIndexOutOfBoundsException: -1 < 0
        at java.util.Vector.elementAt(Vector.java:437)
        at javax.swing.tree.DefaultMutableTreeNode.getChildAt(DefaultMutableTreeNode.java:230)
        at javax.swing.tree.VariableHeightLayoutCache.treeNodesRemoved(VariableHeightLayoutCache.java:543)
        at javax.swing.plaf.basic.BasicTreeUI$TreeModelHandler.treeNodesRemoved(BasicTreeUI.java:2455)
        at javax.swing.tree.DefaultTreeModel.fireTreeNodesRemoved(DefaultTreeModel.java:530)
        at javax.swing.tree.DefaultTreeModel.nodesWereRemoved(DefaultTreeModel.java:308)
        at org.openide.explorer.view.NodeTreeModel$Listener.removed(NodeTreeModel.java:142)
        at org.openide.explorer.view.VisualizerChildren.removed(VisualizerChildren.java:105)
        at org.openide.explorer.view.VisualizerEvent$Removed.run(VisualizerEvent.java:111)
        at org.openide.explorer.view.VisualizerNode$QP.run(VisualizerNode.java:477)
        at org.openide.util.Mutex.doEvent(Mutex.java:912)
        at org.openide.util.Mutex.writeAccess(Mutex.java:329)
        at org.openide.explorer.view.VisualizerNode$QP.runSafe(VisualizerNode.java:461)
        at org.openide.explorer.view.VisualizerNode.childrenRemoved(VisualizerNode.java:279)
        at org.openide.util.WeakListener$Node.childrenRemoved(WeakListener.java:792)
        at org.openide.nodes.Node.fireSubNodesChange(Node.java:847)
        at org.openide.nodes.Children.notifyRemove(Children.java:732)
        at org.openide.nodes.Children$Keys.notifyRemove(Children.java:1928)
        at org.openide.nodes.Children.updateRemove(Children.java:701)
        at org.openide.nodes.Children.setEntries(Children.java:655)
        at org.openide.nodes.Children$3.run(Children.java:1869)
        at org.openide.util.Mutex.postRequest(Mutex.java:875)
        at org.openide.util.Mutex.postWriteRequest(Mutex.java:375)
        at org.openide.nodes.Children$Keys.applyKeys(Children.java:1877)
        at org.openide.nodes.Children$Keys.setKeys(Children.java:1836)
        at org.netbeans.modules.tasklist.core.TaskChildren.refreshKeys(TaskChildren.java:54)
        at org.netbeans.modules.tasklist.core.TaskChildren.propertyChange(TaskChildren.java:87)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:252)
        at org.netbeans.modules.tasklist.core.Task.setSilentUpdate(Task.java:633)
        at org.netbeans.modules.tasklist.core.TaskList.setSilentUpdate(TaskList.java:283)
        at org.netbeans.modules.tasklist.core.TaskList.addRemove(TaskList.java:142)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.register(SuggestionManagerImpl.java:1499)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.stuffCache(SuggestionManagerImpl.java:1872)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.docHidden(SuggestionManagerImpl.java:1814)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.docStop(SuggestionManagerImpl.java:2491)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.notifyViewHidden(SuggestionManagerImpl.java:294)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.notifyViewClosed(SuggestionManagerImpl.java:311)
        at org.netbeans.modules.tasklist.suggestions.SuggestionsView.componentClosed(SuggestionsView.java:234)
        at org.openide.windows.WindowManager.componentCloseNotify(WindowManager.java:200)
        at org.netbeans.core.windows.WindowManagerImpl.access$1800(WindowManagerImpl.java:77)
        at org.netbeans.core.windows.WindowManagerImpl$TopComponentManager.doClose(WindowManagerImpl.java:1738)
        at org.netbeans.core.windows.WindowManagerImpl$TopComponentManager.close(WindowManagerImpl.java:1674)
        at org.openide.windows.TopComponent.close(TopComponent.java:286)
        at org.netbeans.core.windows.ModeImpl.close(ModeImpl.java:624)
        at org.netbeans.core.windows.WorkspaceImpl.closeModes(WorkspaceImpl.java:822)
        at org.netbeans.core.windows.WindowManagerImpl$ProjectSwitchListener$AWT.run_close(WindowManagerImpl.java:1432)
        at org.netbeans.core.windows.WindowManagerImpl$ProjectSwitchListener$AWT.run(WindowManagerImpl.java:1407)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:171)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:448)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:230)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
[catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
==>
java.lang.ArrayIndexOutOfBoundsException: -1 < 0
        at java.util.Vector.elementAt(Vector.java:437)
        at javax.swing.tree.DefaultMutableTreeNode.getChildAt(DefaultMutableTreeNode.java:230)
        at javax.swing.tree.VariableHeightLayoutCache.treeNodesRemoved(VariableHeightLayoutCache.java:543)
        at javax.swing.plaf.basic.BasicTreeUI$TreeModelHandler.treeNodesRemoved(BasicTreeUI.java:2455)
        at javax.swing.tree.DefaultTreeModel.fireTreeNodesRemoved(DefaultTreeModel.java:530)
        at javax.swing.tree.DefaultTreeModel.nodesWereRemoved(DefaultTreeModel.java:308)
        at org.openide.explorer.view.NodeTreeModel$Listener.removed(NodeTreeModel.java:142)
        at org.openide.explorer.view.VisualizerChildren.removed(VisualizerChildren.java:105)
        at org.openide.explorer.view.VisualizerEvent$Removed.run(VisualizerEvent.java:111)
        at org.openide.explorer.view.VisualizerNode$QP.run(VisualizerNode.java:477)
        at org.openide.util.Mutex.doEvent(Mutex.java:912)
        at org.openide.util.Mutex.writeAccess(Mutex.java:329)
        at org.openide.explorer.view.VisualizerNode$QP.runSafe(VisualizerNode.java:461)
        at org.openide.explorer.view.VisualizerNode.childrenRemoved(VisualizerNode.java:279)
        at org.openide.util.WeakListener$Node.childrenRemoved(WeakListener.java:792)
        at org.openide.nodes.Node.fireSubNodesChange(Node.java:847)
        at org.openide.nodes.Children.notifyRemove(Children.java:732)
        at org.openide.nodes.Children$Keys.notifyRemove(Children.java:1928)
        at org.openide.nodes.Children.updateRemove(Children.java:701)
        at org.openide.nodes.Children.setEntries(Children.java:655)
        at org.openide.nodes.Children$3.run(Children.java:1869)
        at org.openide.util.Mutex.postRequest(Mutex.java:875)
        at org.openide.util.Mutex.postWriteRequest(Mutex.java:375)
        at org.openide.nodes.Children$Keys.applyKeys(Children.java:1877)
        at org.openide.nodes.Children$Keys.setKeys(Children.java:1836)
        at org.netbeans.modules.tasklist.core.TaskChildren.refreshKeys(TaskChildren.java:54)
        at org.netbeans.modules.tasklist.core.TaskChildren.propertyChange(TaskChildren.java:87)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:252)
        at org.netbeans.modules.tasklist.core.Task.setSilentUpdate(Task.java:633)
        at org.netbeans.modules.tasklist.core.TaskList.setSilentUpdate(TaskList.java:283)
        at org.netbeans.modules.tasklist.core.TaskList.addRemove(TaskList.java:142)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.register(SuggestionManagerImpl.java:1499)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.stuffCache(SuggestionManagerImpl.java:1872)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.docHidden(SuggestionManagerImpl.java:1814)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.docStop(SuggestionManagerImpl.java:2491)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.notifyViewHidden(SuggestionManagerImpl.java:294)
        at org.netbeans.modules.tasklist.suggestions.SuggestionManagerImpl.notifyViewClosed(SuggestionManagerImpl.java:311)
        at org.netbeans.modules.tasklist.suggestions.SuggestionsView.componentClosed(SuggestionsView.java:234)
        at org.openide.windows.WindowManager.componentCloseNotify(WindowManager.java:200)
        at org.netbeans.core.windows.WindowManagerImpl.access$1800(WindowManagerImpl.java:77)
        at org.netbeans.core.windows.WindowManagerImpl$TopComponentManager.doClose(WindowManagerImpl.java:1738)
        at org.netbeans.core.windows.WindowManagerImpl$TopComponentManager.close(WindowManagerImpl.java:1674)
        at org.openide.windows.TopComponent.close(TopComponent.java:286)
        at org.netbeans.core.windows.ModeImpl.close(ModeImpl.java:624)
        at org.netbeans.core.windows.WorkspaceImpl.closeModes(WorkspaceImpl.java:822)
        at org.netbeans.core.windows.WindowManagerImpl$ProjectSwitchListener$AWT.run_close(WindowManagerImpl.java:1432)
        at org.netbeans.core.windows.WindowManagerImpl$ProjectSwitchListener$AWT.run(WindowManagerImpl.java:1407)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:171)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:448)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:230)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
[catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)