java.lang.NullPointerException
   at org.netbeans.modules.project.ui.ProjectsRootNode.findNode(ProjectsRootNode.java:202)
   at org.netbeans.modules.project.ui.ProjectTab.findNode(ProjectTab.java:656)
   at org.netbeans.modules.project.ui.ProjectUtilities$3$1.run(ProjectUtilities.java:327)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)