java.lang.NoClassDefFoundError: org/eclipse/ui/internal/ActiveEditorAction at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:188) at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:601) at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:567) at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClassImpl(ClasspathManager.java:490) at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass_LockClassLoader(ClasspathManager.java:478) at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:458) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:400) at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:476) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:429) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at org.vssplugin.ui.menuactions.MenuAction.selectionChanged(MenuAction.java:159) at org.eclipse.ui.internal.PluginAction.refreshEnablement(PluginAction.java:206) at org.eclipse.ui.internal.PluginAction.selectionChanged(PluginAction.java:277) at org.eclipse.ui.internal.PluginAction.selectionChanged(PluginAction.java:299) at org.eclipse.ui.internal.AbstractSelectionService.fireSelection(AbstractSelectionService.java:156) at org.eclipse.ui.internal.AbstractSelectionService.setActivePart(AbstractSelectionService.java:282) at org.eclipse.ui.internal.WWinPartService.updateActivePart(WWinPartService.java:135) at org.eclipse.ui.internal.WWinPartService.access$0(WWinPartService.java:125) at org.eclipse.ui.internal.WWinPartService$WWinListener.partDeactivated(WWinPartService.java:50) at org.eclipse.ui.internal.PartListenerList2$4.run(PartListenerList2.java:115) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.runtime.Platform.run(Platform.java:888) at org.eclipse.ui.internal.PartListenerList2.fireEvent(PartListenerList2.java:55) at org.eclipse.ui.internal.PartListenerList2.firePartDeactivated(PartListenerList2.java:113) at org.eclipse.ui.internal.PartService.firePartDeactivated(PartService.java:242) at org.eclipse.ui.internal.PartService.setActivePart(PartService.java:300) at org.eclipse.ui.internal.WorkbenchPagePartList.fireActivePartChanged(WorkbenchPagePartList.java:57) at org.eclipse.ui.internal.PartList.setActivePart(PartList.java:136) at org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3636) at org.eclipse.ui.internal.WorkbenchPage.requestActivation(WorkbenchPage.java:3159) at org.eclipse.ui.internal.PartPane.requestActivation(PartPane.java:279) at org.eclipse.ui.internal.PartPane.handleEvent(PartPane.java:237) 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.Shell.setActiveControl(Shell.java:1447) at org.eclipse.swt.widgets.Shell.WM_MOUSEACTIVATE(Shell.java:2320) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4572) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1610) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2061) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4985) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2525) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4985) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2525) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4985) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2525) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4985) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2525) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:80) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4985) at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2424) at org.eclipse.swt.widgets.Tree.callWindowProc(Tree.java:1533) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Tree.windowProc(Tree.java:5937) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4985) at org.eclipse.swt.internal.win32.OS.PeekMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.PeekMessage(OS.java:3095) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3749) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) 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:344) 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:585) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410)