java.lang.NullPointerException
	at org.openide.explorer.ExplorerManager.findExplorerActionsImpl(ExplorerManager.java:829)
	at org.openide.explorer.ExplorerUtils.activateActions(ExplorerUtils.java:194)
	at org.netbeans.modules.xml.schema.multiview.SchemaColumnViewMultiViewElement.componentDeactivated(SchemaColumnViewMultiViewElement.java:411)
	at org.netbeans.core.multiview.MultiViewPeer.peerComponentDeactivated(MultiViewPeer.java:220)
	at org.netbeans.core.multiview.MultiViewCloneableTopComponent.componentDeactivated(MultiViewCloneableTopComponent.java:129)
	at org.openide.windows.WindowManager.activateComponent(WindowManager.java:270)
Caused: java.lang.IllegalStateException: [Winsys] TopComponent org.netbeans.core.multiview.MultiViewCloneableTopComponent throws runtime exception from its componentDeactivated() method.
Please repair it! Probable cause is at org.openide.explorer.ExplorerManager.findExplorerActionsImpl(ExplorerManager.java:829)
	at org.openide.windows.WindowManager.logThrowable(WindowManager.java:361)
	at org.openide.windows.WindowManager.activateComponent(WindowManager.java:272)
	at org.openide.windows.WindowManager.componentCloseNotify(WindowManager.java:320)
	at org.netbeans.core.windows.WindowManagerImpl.notifyTopComponentClosed(WindowManagerImpl.java:981)
	at org.netbeans.core.windows.Central.removeModeTopComponent(Central.java:959)
	at org.netbeans.core.windows.Central.userClosedTopComponent(Central.java:1929)
	at org.netbeans.core.windows.view.DefaultView.userClosedTopComponent(DefaultView.java:741)
	at org.netbeans.core.windows.view.ui.TabbedHandler.actionPerformed(TabbedHandler.java:319)
	at org.netbeans.swing.tabcontrol.TabbedContainer.postActionEvent(TabbedContainer.java:680)
	at org.netbeans.swing.tabcontrol.TabbedContainerUI.shouldPerformAction(TabbedContainerUI.java:162)
	at org.netbeans.swing.tabcontrol.plaf.DefaultTabbedContainerUI.access$2700(DefaultTabbedContainerUI.java:109)
	at org.netbeans.swing.tabcontrol.plaf.DefaultTabbedContainerUI$DisplayerActionListener.actionPerformed(DefaultTabbedContainerUI.java:1258)
	at org.netbeans.swing.tabcontrol.TabDisplayer.postActionEvent(TabDisplayer.java:543)
	at org.netbeans.swing.tabcontrol.TabDisplayerUI.shouldPerformAction(TabDisplayerUI.java:176)
	at org.netbeans.swing.tabcontrol.plaf.BasicTabDisplayerUI.access$1500(BasicTabDisplayerUI.java:116)
	at org.netbeans.swing.tabcontrol.plaf.BasicTabDisplayerUI$BasicDisplayerMouseListener.performCommand(BasicTabDisplayerUI.java:715)
	at org.netbeans.swing.tabcontrol.plaf.BasicTabDisplayerUI$BasicDisplayerMouseListener.potentialCommand(BasicTabDisplayerUI.java:700)
	at org.netbeans.swing.tabcontrol.plaf.BasicTabDisplayerUI$BasicDisplayerMouseListener.mouseReleased(BasicTabDisplayerUI.java:748)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
	at java.awt.Component.processMouseEvent(Component.java:6041)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
	at java.awt.Component.processEvent(Component.java:5806)
	at java.awt.Container.processEvent(Container.java:2058)
	at java.awt.Component.dispatchEventImpl(Component.java:4413)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4243)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
	at java.awt.Container.dispatchEventImpl(Container.java:2102)
	at java.awt.Window.dispatchEventImpl(Window.java:2440)
	at java.awt.Component.dispatchEvent(Component.java:4243)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)