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@1af24e2[Name=Databases, displayName=Databases]} is null
   at org.openide.nodes.LazyNode.switchToOriginal(LazyNode.java:85)
   at org.openide.nodes.LazyNode$SwitchChildren.addNotify(LazyNode.java:107)
   at org.openide.nodes.Children.callAddNotify(Children.java:554)
   at org.openide.nodes.EntrySupport$Default.getArray(EntrySupport.java:758)
   at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:169)
   at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:225)
   at org.openide.nodes.EntrySupport$Default.getNodesCount(EntrySupport.java:229)
   at org.openide.nodes.Children.getNodesCount(Children.java:488)
   at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:258)
   at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:248)
   at org.openide.explorer.view.VisualizerNode.getChildCount(VisualizerNode.java:325)
   at javax.swing.tree.DefaultTreeModel.getChildCount(DefaultTreeModel.java:168)
   at javax.swing.tree.FixedHeightLayoutCache$FHTreeStateNode.expand(FixedHeightLayoutCache.java:1135)
   at javax.swing.tree.FixedHeightLayoutCache.ensurePathIsExpanded(FixedHeightLayoutCache.java:645)
   at javax.swing.tree.FixedHeightLayoutCache.setExpandedState(FixedHeightLayoutCache.java:282)
   at javax.swing.plaf.basic.BasicTreeUI.updateExpandedDescendants(BasicTreeUI.java:1643)
   at javax.swing.plaf.basic.BasicTreeUI$Handler.treeExpanded(BasicTreeUI.java:3716)
   at javax.swing.JTree.fireTreeExpanded(JTree.java:2656)
   at javax.swing.JTree.setExpandedState(JTree.java:3427)
   at javax.swing.JTree.expandPath(JTree.java:2163)
   at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:2204)
   at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(BasicTreeUI.java:2191)
   at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(BasicTreeUI.java:2149)
   at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3511)
   at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressedDND(BasicTreeUI.java:3497)
   at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3456)
   at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262)
   at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262)
   at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262)
   at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262)
   at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262)
   at java.awt.Component.processMouseEvent(Component.java:6260)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
   at java.awt.Component.processEvent(Component.java:6028)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4630)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4574)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4235)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4168)
   at java.awt.Container.dispatchEventImpl(Container.java:2085)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137)
   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)