java.lang.IllegalStateException: The model is not initialized or is broken.
   at org.netbeans.modules.xml.xdm.XDMModel.checkStableOrParsingState(XDMModel.java:983)
   at org.netbeans.modules.xml.xdm.XDMModel.getDocument(XDMModel.java:824)
   at org.netbeans.modules.xml.xdm.nodes.NodeImpl.getNamespaceURI(NodeImpl.java:601)
   at org.netbeans.modules.maven.model.pom.impl.POMComponentFactoryImpl.getQName(POMComponentFactoryImpl.java:63)
   at org.netbeans.modules.maven.model.pom.impl.POMComponentFactoryImpl.create(POMComponentFactoryImpl.java:81)
   at org.netbeans.modules.maven.model.pom.impl.POMComponentFactoryImpl.create(POMComponentFactoryImpl.java:51)
   at org.netbeans.modules.maven.model.pom.impl.POMComponentImpl.populateChildren(POMComponentImpl.java:87)
   at org.netbeans.modules.xml.xam.AbstractComponent._getChildren(AbstractComponent.java:180)
   at org.netbeans.modules.xml.xam.AbstractComponent.getChildren(AbstractComponent.java:196)
   at org.netbeans.modules.maven.model.pom.impl.POMComponentImpl.getChildElementText(POMComponentImpl.java:157)
   at org.netbeans.modules.maven.model.pom.impl.ProjectImpl.getModelVersion(ProjectImpl.java:455)
   at org.netbeans.modules.maven.navigator.POMModelVisitor.visit(POMModelVisitor.java:158)
Caused: java.lang.reflect.InvocationTargetException
   at sun.reflect.GeneratedMethodAccessor94.invoke(GeneratedMethodAccessor94.java:0)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.netbeans.modules.maven.navigator.POMModelVisitor$PomChildren.rescan(POMModelVisitor.java:1448)
   at org.netbeans.modules.maven.navigator.POMModelVisitor$PomChildren.addNotify(POMModelVisitor.java:1431)
   at org.openide.nodes.Children.callAddNotify(Children.java:551)
   at org.openide.nodes.EntrySupport$Default.getArray(EntrySupport.java:755)
   at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:166)
   at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:222)
   at org.openide.nodes.EntrySupport$Default.getNodesCount(EntrySupport.java:226)
   at org.openide.nodes.Children.getNodesCount(Children.java:485)
   at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:255)
   at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:245)
   at org.openide.explorer.view.VisualizerNode.getChildCount(VisualizerNode.java:322)
   at javax.swing.tree.DefaultTreeModel.getChildCount(DefaultTreeModel.java:168)
   at javax.swing.tree.FixedHeightLayoutCache$FHTreeStateNode.expand(FixedHeightLayoutCache.java:1135)
   at javax.swing.tree.FixedHeightLayoutCache.rebuild(FixedHeightLayoutCache.java:600)
   at javax.swing.tree.FixedHeightLayoutCache.treeStructureChanged(FixedHeightLayoutCache.java:472)
   at javax.swing.plaf.basic.BasicTreeUI$Handler.treeStructureChanged(BasicTreeUI.java:3824)
   at javax.swing.tree.DefaultTreeModel.fireTreeStructureChanged(DefaultTreeModel.java:561)
   at javax.swing.tree.DefaultTreeModel.nodeStructureChanged(DefaultTreeModel.java:347)
   at javax.swing.tree.DefaultTreeModel.setRoot(DefaultTreeModel.java:117)
   at org.openide.explorer.view.NodeTreeModel$1.run(NodeTreeModel.java:119)
   at org.openide.util.Mutex.doEvent(Mutex.java:1338)
   at org.openide.util.Mutex.readAccess(Mutex.java:345)
   at org.openide.explorer.view.NodeTreeModel.setNode(NodeTreeModel.java:104)
   at org.openide.explorer.view.TreeView.synchronizeRootContext(TreeView.java:839)
   at org.openide.explorer.view.TreeView$TreePropertyListener$1.run(TreeView.java:1223)
   at org.openide.util.Mutex.readAccess(Mutex.java:362)
   at org.openide.util.Mutex$1R.run(Mutex.java:1304)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1321)
   at org.openide.util.Mutex.readAccess(Mutex.java:351)
   at org.openide.explorer.view.TreeView$TreePropertyListener.propertyChange(TreeView.java:1219)
   at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:193)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
   at org.openide.explorer.ExplorerManager$2.run(ExplorerManager.java:865)
   at org.openide.util.Mutex.doEvent(Mutex.java:1338)
   at org.openide.util.Mutex.readAccess(Mutex.java:345)
   at org.openide.explorer.ExplorerManager.fireInAWT(ExplorerManager.java:862)
   at org.openide.explorer.ExplorerManager$1SetRootContext.run(ExplorerManager.java:487)
   at org.openide.util.Mutex.readAccess(Mutex.java:362)
   at org.openide.util.Mutex$1R.run(Mutex.java:1304)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1832)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1323)
   at org.openide.util.Mutex.readAccess(Mutex.java:351)
   at org.openide.explorer.ExplorerManager.setRootContext(ExplorerManager.java:499)
   at org.netbeans.modules.maven.navigator.POMModelPanel$4.run(POMModelPanel.java:328)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:134)
   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)