java.lang.NullPointerException
   at org.netbeans.core.ui.warmup.MenuWarmUpTask$NbWindowsAdapter.run(MenuWarmUpTask.java:214)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1368)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1906)