java.lang.IllegalArgumentException: Original Node from map {position=101, iconResource=org/netbeans/modules/db/resources/database.gif, name=Databases, original=null, displayName=Databases, instanceCreate=org.openide.nodes.LazyNode@1f91958[Name=Databases, displayName=Databases]} is null
   at org.openide.nodes.LazyNode.switchToOriginal(LazyNode.java:82)
   at org.openide.nodes.LazyNode$SwitchChildren.addNotify(LazyNode.java:104)
   at org.openide.nodes.Children.callAddNotify(Children.java:551)
   at org.openide.nodes.EntrySupport$Default.getArray(EntrySupport.java:755)
   at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:166)
   at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:222)
   at org.openide.nodes.EntrySupport$Default.getNodesCount(EntrySupport.java:226)
   at org.openide.nodes.Children.getNodesCount(Children.java:485)
   at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:255)
   at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:245)
   at org.openide.explorer.view.VisualizerNode.getChildCount(VisualizerNode.java:322)
   at javax.swing.tree.DefaultTreeModel.getChildCount(DefaultTreeModel.java:168)
   at javax.swing.tree.FixedHeightLayoutCache$VisibleFHTreeStateNodeEnumeration.<init>(FixedHeightLayoutCache.java:1480)
   at javax.swing.tree.FixedHeightLayoutCache$VisibleFHTreeStateNodeEnumeration.<init>(FixedHeightLayoutCache.java:1473)
   at javax.swing.tree.FixedHeightLayoutCache.getVisiblePathsFrom(FixedHeightLayoutCache.java:263)
   at javax.swing.plaf.basic.BasicTreeUI.paint(BasicTreeUI.java:1133)
   at javax.swing.plaf.metal.MetalTreeUI.paint(MetalTreeUI.java:152)
   at javax.swing.plaf.ComponentUI.update(ComponentUI.java:143)
   at javax.swing.JComponent.paintComponent(JComponent.java:752)
   at javax.swing.JComponent.paint(JComponent.java:1029)
   at org.openide.explorer.view.TreeView$ExplorerTree.access$1401(TreeView.java:1768)
   at org.openide.explorer.view.TreeView$ExplorerTree.guardedPaint(TreeView.java:1902)
   at org.openide.explorer.view.TreeView$ExplorerTree.access$1800(TreeView.java:1768)
   at org.openide.explorer.view.TreeView$ExplorerTree$GuardedActions.run(TreeView.java:2175)
   at org.openide.util.Mutex.readAccess(Mutex.java:327)
   at org.openide.util.Mutex$1R.run(Mutex.java:1302)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1832)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1323)
   at org.openide.util.Mutex.readAccess(Mutex.java:275)
   at org.openide.explorer.view.TreeView$ExplorerTree$GuardedActions.<init>(TreeView.java:2168)
   at org.openide.explorer.view.TreeView$ExplorerTree.paint(TreeView.java:1875)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at javax.swing.JViewport.paint(JViewport.java:747)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at org.netbeans.swing.tabcontrol.TabbedContainer.paint(TabbedContainer.java:956)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at javax.swing.JLayeredPane.paint(JLayeredPane.java:567)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at javax.swing.JLayeredPane.paint(JLayeredPane.java:567)
   at javax.swing.JComponent.paintChildren(JComponent.java:862)
   at javax.swing.JComponent.paint(JComponent.java:1038)
   at javax.swing.JComponent.paintToOffscreen(JComponent.java:5124)
   at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:278)
   at javax.swing.RepaintManager.paint(RepaintManager.java:1224)
   at javax.swing.JComponent._paintImmediately(JComponent.java:5072)
   at javax.swing.JComponent.paintImmediately(JComponent.java:4882)
   at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:785)
   at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:713)
   at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:693)
   at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:125)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:134)
   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)