Report an error:when i click the "component palette" in View menu

java.lang.NullPointerException
     void oracle.ideimpl.palette.PaletteImpl.populate()
          PaletteImpl.java:240
     void oracle.ideimpl.palette.PaletteWindowImpl.checkIfPopulated()
          PaletteWindowImpl.java:323
     void oracle.ideimpl.palette.PaletteWindowImpl.show()
          PaletteWindowImpl.java:364
     boolean oracle.ideimpl.palette.PaletteManagerImpl.handleEvent(oracle.ide.IdeAction, oracle.ide.addin.Context)
          PaletteManagerImpl.java:174
     void oracle.ide.IdeAction$1.run()
          IdeAction.java:579
     void java.awt.event.InvocationEvent.dispatch()
          InvocationEvent.java:154
     void java.awt.EventQueue.dispatchEvent(java.awt.AWTEvent)
          EventQueue.java:337
     boolean java.awt.EventDispatchThread.pumpOneEventForHierarchy(java.awt.Component)
          EventDispatchThread.java:131
     void java.awt.EventDispatchThread.pumpEventsForHierarchy(java.awt.Conditional, java.awt.Component)
          EventDispatchThread.java:98
     void java.awt.EventDispatchThread.pumpEvents(java.awt.Conditional)
          EventDispatchThread.java:93
     void java.awt.EventDispatchThread.run()
          EventDispatchThread.java:85

This error doesn't help much unless you tell us what version of jdeveloper you are using, what is the frequency this error occurs, how do you exactly reproduce the error. More detail will help.
Thanks,
Stuart

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