java.lang.NullPointerException
        at org.netbeans.modules.xml.wsdl.ui.view.treeeditor.NodesFactory.createSchemaNode(NodesFactory.java:124)
        at org.netbeans.modules.xml.wsdl.ui.view.treeeditor.NodesFactory.access$100(NodesFactory.java:88)
        at org.netbeans.modules.xml.wsdl.ui.view.treeeditor.NodesFactory$WSDLCreatorVisitor.visit(NodesFactory.java:273)
        at org.netbeans.modules.xml.wsdl.model.extensions.xsd.impl.WSDLSchemaImpl.accept(WSDLSchemaImpl.java:83)
        at org.netbeans.modules.xml.wsdl.ui.view.treeeditor.NodesFactory$WSDLCreatorVisitor.createNode(NodesFactory.java:150)
        at org.netbeans.modules.xml.wsdl.ui.view.treeeditor.NodesFactory.create(NodesFactory.java:111)
        at org.netbeans.modules.xml.wsdl.ui.view.treeeditor.WSDLChildFactory.createNodeForKey(WSDLChildFactory.java:71)
        at org.netbeans.modules.xml.wsdl.ui.view.treeeditor.WSDLChildFactory.createNodeForKey(WSDLChildFactory.java:51)
        at org.openide.nodes.ChildFactory.createNodesForKey(ChildFactory.java:116)
        at org.openide.nodes.SynchChildren.createNodes(SynchChildren.java:78)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1609)
        at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:168)
        at org.openide.nodes.EntrySupport$Default$Info.nodes(EntrySupport.java:916)
        at org.openide.nodes.EntrySupport$Default.justComputeNodes(EntrySupport.java:244)
        at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:101)
        at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:173)
        at org.openide.nodes.EntrySupport$Default.snapshot(EntrySupport.java:139)
        at org.openide.nodes.Children.snapshot(Children.java:503)
        at org.openide.nodes.NodeMemberEvent.<init>(NodeMemberEvent.java:84)
        at org.openide.nodes.Node.fireSubNodesChange(Node.java:1087)
        at org.openide.nodes.EntrySupport$Default.notifyAdd(EntrySupport.java:685)
        at org.openide.nodes.EntrySupport$Default.updateAdd(EntrySupport.java:511)
        at org.openide.nodes.EntrySupport$Default.setEntries(EntrySupport.java:343)
        at org.openide.nodes.Children$Keys$2.run(Children.java:1503)
        at org.openide.util.Mutex$1Exec.run(Mutex.java:1239)
        at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1810)
        at org.openide.util.Mutex.postRequest(Mutex.java:1245)
        at org.openide.util.Mutex.postRequest(Mutex.java:1209)
        at org.openide.util.Mutex.postWriteRequest(Mutex.java:582)
        at org.openide.nodes.Children$Keys.applyKeys(Children.java:1512)
        at org.openide.nodes.Children$Keys.setKeys(Children.java:1456)
        at org.openide.nodes.SynchChildren.refresh(SynchChildren.java:85)
        at org.openide.nodes.SynchChildren.addNotify(SynchChildren.java:68)
        at org.openide.nodes.Children.callAddNotify(Children.java:546)
        at org.openide.nodes.EntrySupport$Default.getArray(EntrySupport.java:731)
        at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:208)
        at org.openide.nodes.EntrySupport$Default.getNodesCount(EntrySupport.java:223)
        at org.openide.nodes.Children.getNodesCount(Children.java:491)
        at org.openide.explorer.view.TreeView$6.run(TreeView.java:912)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)