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java.lang.NullPointerException: 	at com.fatwire.csdt.views.ElementTreeView$8.menuAboutToShow(ElementTreeView.java:283)	at org.eclipse.jface.action.MenuManager.fireAboutToShow(MenuManager.java:338)	at org.eclipse.jface.action.MenuManager.handleAboutToShow(MenuManager.java:469)	at org.eclipse.jface.action.MenuManager.access$1(MenuManager.java:465)	at org.eclipse.jface.action.MenuManager$2.menuShown(MenuManager.java:491)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:241)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1058)	at org.eclipse.swt.widgets.Control.WM_INITMENUPOPUP(Control.java:4487)	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4190)	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)	at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1598)	at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2038)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:4873)	at org.eclipse.swt.internal.win32.OS.TrackPopupMenu(Native Method)	at org.eclipse.swt.widgets.Menu._setVisible(Menu.java:256)	at org.eclipse.swt.widgets.Display.runPopups(Display.java:4107)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3651)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)	at org.eclipse.equinox.launcher.Main.run(Main.java:1408)