java.lang.IllegalStateException: Can't overwrite cause
        at java.lang.Throwable.initCause(Throwable.java:320)
        at org.openide.awt.MenuBar.allInstances(MenuBar.java:268)
        at org.openide.awt.MenuBar$LazyMenu$MenuFolder.createInstance(MenuBar.java:660)
        at org.openide.loaders.FolderInstance.defaultProcessObjects(FolderInstance.java:767)
        at org.openide.loaders.FolderInstance.access$000(FolderInstance.java:99)
        at org.openide.loaders.FolderInstance$2.run(FolderInstance.java:655)
        at org.openide.util.Task.run(Task.java:244)
        at org.openide.awt.AWTTask.run(AWTTask.java:57)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)