java.lang.NullPointerException
   at org.openide.util.ImageUtilities$ToolTipImage.getProperty(ImageUtilities.java:874)
   at org.netbeans.modules.java.JavaNode.prefferImage(JavaNode.java:347)
   at org.netbeans.modules.java.JavaNode.getIcon(JavaNode.java:330)
   at org.openide.nodes.FilterNode.getIcon(FilterNode.java:564)
   at org.netbeans.modules.nbform.FormEditorSupport.registerNodeListener(FormEditorSupport.java:266)
   at org.netbeans.modules.nbform.FormEditorSupport.setTopComponent(FormEditorSupport.java:1203)
   at org.netbeans.modules.nbform.FormDesignerTC.setMultiViewCallback(FormDesignerTC.java:368)
   at org.netbeans.core.multiview.MultiViewModel.getElementForDescription(MultiViewModel.java:225)
   at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:132)
   at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:128)
   at org.netbeans.core.multiview.MultiViewPeer.assignLookup(MultiViewPeer.java:261)
   at org.netbeans.core.multiview.MultiViewCloneableTopComponent.getLookup(MultiViewCloneableTopComponent.java:120)
   at org.netbeans.spi.palette.PaletteSwitch.watchOpenedTCs(PaletteSwitch.java:319)
   at org.netbeans.spi.palette.PaletteSwitch.access$100(PaletteSwitch.java:79)
   at org.netbeans.spi.palette.PaletteSwitch$2.propertyChange(PaletteSwitch.java:282)
   at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
   at org.netbeans.core.windows.RegistryImpl.doFirePropertyChange(RegistryImpl.java:329)
   at org.netbeans.core.windows.RegistryImpl.access$100(RegistryImpl.java:69)
   at org.netbeans.core.windows.RegistryImpl$1.run(RegistryImpl.java:170)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:745)
   at java.awt.EventQueue.access$300(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:706)
   at java.awt.EventQueue$3.run(EventQueue.java:704)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:715)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)