java.lang.NullPointerException
        at org.netbeans.modules.xml.wsdl.ui.netbeans.module.WSDLTreeViewMultiViewElement.getToolbarRepresentation(WSDLTreeViewMultiViewElement.java:430)
        at org.netbeans.core.multiview.MultiViewPeer.showCurrentElement(MultiViewPeer.java:304)
        at org.netbeans.core.multiview.MultiViewPeer.showCurrentElement(MultiViewPeer.java:265)
        at org.netbeans.core.multiview.MultiViewPeer$SelectionListener.selectionChanged(MultiViewPeer.java:673)
        at org.netbeans.core.multiview.MultiViewModel.fireSelectionChanged(MultiViewModel.java:243)
        at org.netbeans.core.multiview.MultiViewModel.setActiveDescription(MultiViewModel.java:115)
        at org.netbeans.core.multiview.MultiViewModel$BtnGroup.setSelected(MultiViewModel.java:293)
        at javax.swing.JToggleButton$ToggleButtonModel.setSelected(JToggleButton.java:237)
        at javax.swing.ButtonGroup.setSelected(ButtonGroup.java:147)
        at org.netbeans.core.multiview.MultiViewModel$BtnGroup.setSelected(MultiViewModel.java:289)
        at javax.swing.JToggleButton$ToggleButtonModel.setSelected(JToggleButton.java:237)
        at javax.swing.AbstractButton.setSelected(AbstractButton.java:329)
        at org.netbeans.core.multiview.TabsComponent.changeActiveManually(TabsComponent.java:188)
        at org.netbeans.core.multiview.MultiViewPeer$MVTCHandler.requestActive(MultiViewPeer.java:700)
        at org.netbeans.core.api.multiview.MultiViewHandler.requestActive(MultiViewHandler.java:95)
        at org.netbeans.modules.xml.wsdl.ui.netbeans.module.WSDLMultiViewFactory.requestMultiviewActive(WSDLMultiViewFactory.java:114)
        at org.netbeans.modules.xml.wsdl.ui.netbeans.module.WSDLEditorSupport.open(WSDLEditorSupport.java:169)
        at org.netbeans.modules.xml.wsdl.ui.actions.WSDLViewOpenAction.performAction(WSDLViewOpenAction.java:52)
        at org.openide.util.actions.NodeAction$DelegateAction$1.run(NodeAction.java:589)
        at org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:77)
        at org.openide.util.actions.NodeAction$DelegateAction.actionPerformed(NodeAction.java:585)
        at org.openide.explorer.view.TreeView$PopupSupport.mouseClicked(TreeView.java:1515)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:253)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:252)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:252)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:252)
        at java.awt.Component.processMouseEvent(Component.java:6266)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6028)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4574)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4247)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2475)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)