java.lang.IllegalArgumentException: The node is not valid source node, node=[BODY: null]
	at org.netbeans.modules.visualweb.html.model.HtmlModel.validateSourceNode(HtmlModel.java:523)
	at org.netbeans.modules.visualweb.html.model.HtmlModel.validateComponentNode(HtmlModel.java:528)
	at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.validateComponentNode(HtmlVisualWebComponent.java:391)
	at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.getNodeRepresentation(HtmlVisualWebComponent.java:740)
	at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent$NbComponentNodeChildren.createNodes(HtmlVisualWebComponent.java:975)
	at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent$NbComponentNodeChildren.createNodes(HtmlVisualWebComponent.java:941)
	at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1526)
	at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:168)
	at org.openide.nodes.EntrySupport$Default$Info.nodes(EntrySupport.java:926)
	at org.openide.nodes.EntrySupport$Default.justComputeNodes(EntrySupport.java:238)
	at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:101)
	at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:159)
	at org.openide.nodes.EntrySupport$Default.createSnapshot(EntrySupport.java:141)
	at org.openide.nodes.NodeEvent.<init>(NodeEvent.java:59)
	at org.openide.nodes.Node.fireNodeDestroyed(Node.java:1111)
	at org.openide.nodes.Children$Keys.destroyNodes(Children.java:1476)
	at org.openide.nodes.EntrySupport$Default.notifyRemove(EntrySupport.java:669)
	at org.openide.nodes.EntrySupport$Default.updateRemove(EntrySupport.java:379)
	at org.openide.nodes.EntrySupport$Default.setEntries(EntrySupport.java:328)
	at org.openide.nodes.Children$Keys$2.run(Children.java:1420)
	at org.openide.util.Mutex.postRequest(Mutex.java:1251)
	at org.openide.util.Mutex.postWriteRequest(Mutex.java:582)
	at org.openide.nodes.Children$Keys.applyKeys(Children.java:1429)
	at org.openide.nodes.Children$Keys.setKeys(Children.java:1410)
	at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelComponent$ComponentChildren.updateKeys(NavigatorPanelComponent.java:190)
	at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelComponent$ComponentChildren.updateRootChildren(NavigatorPanelComponent.java:186)
	at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelComponent$ComponentChildren.setVisualWebComponent(NavigatorPanelComponent.java:195)
	at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelComponent$ComponentChildren.access$000(NavigatorPanelComponent.java:166)
	at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelComponent.setVisualWebComponent(NavigatorPanelComponent.java:127)
	at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelImpl.setCurrentModel(NavigatorPanelImpl.java:114)
	at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelImpl.updateModel(NavigatorPanelImpl.java:107)
	at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelImpl.access$000(NavigatorPanelImpl.java:58)
	at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelImpl$NavigatorLookupListener.resultChanged(NavigatorPanelImpl.java:128)
	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:449)
	at $Proxy2.resultChanged(Unknown Source)
	at org.openide.util.lookup.ProxyLookup$1Notify.run(ProxyLookup.java:173)
	at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:179)
	at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:119)
	at org.netbeans.modules.navigator.NavigatorController$ClientsLookup.beforeLookup(NavigatorController.java:754)
	at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:197)
	at org.netbeans.modules.navigator.NavigatorController.updateContext(NavigatorController.java:380)
	at org.netbeans.modules.navigator.NavigatorController.updateContext(NavigatorController.java:274)
	at org.netbeans.modules.navigator.NavigatorController.access$900(NavigatorController.java:99)
[catch] at org.netbeans.modules.navigator.NavigatorController$ActNodeSetter.run(NavigatorController.java:716)
	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: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)