java.lang.NullPointerException
        at org.netbeans.core.output.OutputTabTerm$OutTermPane.doClear(OutputTabTerm.java:1664)
        at org.netbeans.core.output.OutputTabTerm$OutTermPane$TermOutputWriter.reset(OutputTabTerm.java:1060)
        at org.netbeans.core.NotifyException.createDetails(NotifyException.java:234)
        at org.netbeans.core.NotifyException.update(NotifyException.java:198)
        at org.netbeans.core.NotifyException.actionPerformed(NotifyException.java:256)
        at org.netbeans.core.NbPresenter$ButtonListener.actionPerformed(NbPresenter.java:906)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1767)
        at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1820)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:258)
        at java.awt.Component.processMouseEvent(Component.java:5021)
        at java.awt.Component.processEvent(Component.java:4818)
        at java.awt.Container.processEvent(Container.java:1380)
        at java.awt.Component.dispatchEventImpl(Component.java:3526)
        at java.awt.Container.dispatchEventImpl(Container.java:1437)
        at java.awt.Component.dispatchEvent(Component.java:3367)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3214)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2929)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2859)
        at java.awt.Container.dispatchEventImpl(Container.java:1423)
        at java.awt.Window.dispatchEventImpl(Window.java:1566)
        at java.awt.Component.dispatchEvent(Component.java:3367)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:445)
[catch] at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:190)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:144)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:130)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:98)