java.lang.NullPointerException
   at org.netbeans.modules.jdk.project.JDKProject$ProjectInformationImpl.getDisplayName(JDKProject.java:447)
   at org.netbeans.api.project.ProjectUtils$AnnotateIconProxyProjectInformation.getDisplayName(ProjectUtils.java:458)
   at org.netbeans.modules.project.ui.PhysicalView$GroupNode.getDisplayName(PhysicalView.java:242)
   at org.openide.nodes.FilterNode.getDisplayName(FilterNode.java:528)
   at org.openide.explorer.view.VisualizerNode.run(VisualizerNode.java:448)
   at org.openide.util.Mutex.readAccess(Mutex.java:372)
   at org.openide.util.Mutex$1R.run(Mutex.java:1322)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1921)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1341)
   at org.openide.util.Mutex.readAccess(Mutex.java:361)
   at org.openide.explorer.view.VisualizerNode$QP.processQueue(VisualizerNode.java:685)
   at org.openide.explorer.view.VisualizerNode$QP.access$000(VisualizerNode.java:624)
   at org.openide.explorer.view.VisualizerNode$QP$ProcessQueue.run(VisualizerNode.java:706)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)