java.lang.NullPointerException
        at org.netbeans.modules.xslt.tmap.util.Util.getTMapFo(Util.java:233)
        at org.netbeans.modules.xslt.core.context.MapperContextFactory.createMapperContext(MapperContextFactory.java:63)
        at org.netbeans.modules.xslt.core.XSLTDataEditorSupport$XSLTEnv.getMapperContext(XSLTDataEditorSupport.java:448)
        at org.netbeans.modules.xslt.core.XSLTDataEditorSupport.getMapperContext(XSLTDataEditorSupport.java:253)
        at org.netbeans.modules.xslt.core.XSLTDataObject$1.convert(XSLTDataObject.java:113)
        at org.netbeans.modules.xslt.core.XSLTDataObject$1.convert(XSLTDataObject.java:101)
        at org.openide.util.lookup.InstanceContent$ConvertingItem.getInstance(InstanceContent.java:313)
        at org.openide.util.lookup.SimpleLookup.lookup(SimpleLookup.java:100)
        at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:205)
        at org.netbeans.modules.xslt.core.multiview.mapper.MapperMultiViewElement.createAssociateLookup(MapperMultiViewElement.java:479)
        at org.netbeans.modules.xslt.core.multiview.mapper.MapperMultiViewElement.initializeLookup(MapperMultiViewElement.java:474)
        at org.netbeans.modules.xslt.core.multiview.mapper.MapperMultiViewElement.<init>(MapperMultiViewElement.java:102)
        at org.netbeans.modules.xslt.core.multiview.mapper.MapperMultiViewElementDesc.createElement(MapperMultiViewElementDesc.java:58)
        at org.netbeans.core.multiview.MultiViewModel.getElementForDescription(MultiViewModel.java:206)
        at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:127)
        at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:123)
        at org.netbeans.core.multiview.MultiViewPeer.showCurrentElement(MultiViewPeer.java:273)
        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 org.netbeans.core.multiview.TabsComponent$ButtonMouseListener.mousePressed(TabsComponent.java:481)
        at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:263)
        at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262)
        at java.awt.Component.processMouseEvent(Component.java:6260)
        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:4235)
        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:117)
        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)