java.lang.NoClassDefFoundError: org/openide/util/Enumerations$1RDupls at org.openide.util.Enumerations.removeDuplicates(Enumerations.java:143) at org.openide.actions.FileSystemAction.createMenu(FileSystemAction.java:177) at org.openide.actions.FileSystemAction.createMenu(FileSystemAction.java:159) at org.openide.actions.FileSystemAction$Menu.(FileSystemAction.java:269) at org.openide.actions.FileSystemAction$DelegateAction.getPopupPresenter(FileSystemAction.java:358) at org.openide.util.Utilities.actionsToPopup(Utilities.java:2772) at org.openide.util.Utilities.actionsToPopup(Utilities.java:2858) at org.openide.explorer.view.TreeView.createPopup(TreeView.java:1070) at org.openide.explorer.view.TreeView$PopupAdapter.showPopup(TreeView.java:1558) at org.openide.awt.MouseUtils$PopupMouseAdapter.maybePopup(MouseUtils.java:189) at org.openide.awt.MouseUtils$PopupMouseAdapter.mousePressed(MouseUtils.java:180) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:263) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.Component.processMouseEvent(Component.java:6372) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6140) at java.awt.Container.processEvent(Container.java:2083) at java.awt.Component.dispatchEventImpl(Component.java:4737) at java.awt.Container.dispatchEventImpl(Container.java:2141) at java.awt.Component.dispatchEvent(Component.java:4565) at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4619) at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4277) at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4210) at java.awt.Container.dispatchEventImpl(Container.java:2127) at java.awt.Window.dispatchEventImpl(Window.java:2482) at java.awt.Component.dispatchEvent(Component.java:4565) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:684) at java.awt.EventQueue.access$000(EventQueue.java:85) at java.awt.EventQueue$1.run(EventQueue.java:643) at java.awt.EventQueue$1.run(EventQueue.java:641) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98) at java.awt.EventQueue$2.run(EventQueue.java:657) at java.awt.EventQueue$2.run(EventQueue.java:655) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.awt.EventQueue.dispatchEvent(EventQueue.java:654) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)