java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at oracle.ide.Ide.getActiveWorkspace(Ide.java:870)
at oracle.ide.IdeContext.(IdeContext.java:48)
at oracle.ide.IdeContext.(IdeContext.java:133)
at oracle.ide.IdeContext.(IdeContext.java:160)
at oracle.ideimpl.MainWindowImpl.getContext(MainWindowImpl.java:515)
at oracle.ide.IdeAction$1.run(IdeAction.java:567)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

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