java.lang.NullPointerException
        at org.netbeans.modules.xml.schema.model.impl.resolver.ResolveSession.checkAllDependingModelsLoaded(ResolveSession.java:243)
        at org.netbeans.modules.xml.schema.model.impl.resolver.ResolveSession.getInclusionGraph(ResolveSession.java:162)
        at org.netbeans.modules.xml.schema.model.impl.resolver.IncludeResolver.getMegaIncludedModels(IncludeResolver.java:200)
        at org.netbeans.modules.xml.schema.model.impl.resolver.IncludeResolver.resolveUpwards(IncludeResolver.java:137)
        at org.netbeans.modules.xml.schema.model.impl.resolver.ImportResolver.findInIncludedImportsUpwards(ImportResolver.java:216)
        at org.netbeans.modules.xml.schema.model.impl.resolver.ChamelionResolver.resolve(ChamelionResolver.java:109)
        at org.netbeans.modules.xml.schema.model.impl.SchemaModelImpl.resolveImpl(SchemaModelImpl.java:174)
        at org.netbeans.modules.xml.schema.model.impl.SchemaModelImpl.resolve(SchemaModelImpl.java:153)
        at org.netbeans.modules.xml.wsdl.model.extensions.xsd.impl.SchemaReferenceImpl.get(SchemaReferenceImpl.java:92)
        at org.netbeans.modules.xml.wsdl.model.extensions.xsd.impl.SchemaReferenceImpl.get(SchemaReferenceImpl.java:63)
        at org.netbeans.modules.xml.wsdl.ui.view.treeeditor.PartNode.getHtmlDisplayName(PartNode.java:361)
        at org.openide.explorer.view.VisualizerNode.getHtmlDisplayName(VisualizerNode.java:535)
        at org.openide.explorer.view.NodeRenderer.getTreeCellRendererComponent(NodeRenderer.java:125)
        at javax.swing.plaf.basic.BasicTreeUI$NodeDimensionsHandler.getNodeDimensions(BasicTreeUI.java:2717)
        at javax.swing.tree.AbstractLayoutCache.getNodeDimensions(AbstractLayoutCache.java:475)
        at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:535)
        at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:181)
        at javax.swing.plaf.basic.BasicTreeUI.getPathBounds(BasicTreeUI.java:515)
        at javax.swing.plaf.basic.BasicTreeUI.getPathBounds(BasicTreeUI.java:508)
        at javax.swing.plaf.basic.BasicTreeUI$Handler.treeNodesChanged(BasicTreeUI.java:3761)
        at javax.swing.tree.DefaultTreeModel.fireTreeNodesChanged(DefaultTreeModel.java:468)
        at javax.swing.tree.DefaultTreeModel.nodesChanged(DefaultTreeModel.java:330)
        at javax.swing.tree.DefaultTreeModel.nodeChanged(DefaultTreeModel.java:261)
        at org.openide.explorer.view.NodeTreeModel$Listener.update(NodeTreeModel.java:261)
        at org.openide.explorer.view.VisualizerNode.run(VisualizerNode.java:455)
        at org.openide.util.Mutex.readAccess(Mutex.java:362)
        at org.openide.util.Mutex$1R.run(Mutex.java:1301)
        at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1811)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320)
        at org.openide.util.Mutex.readAccess(Mutex.java:351)
        at org.openide.explorer.view.VisualizerNode$QP.run(VisualizerNode.java:676)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:633)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117)
        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)