WARNING [org.openide.nodes.NodeOp] java.lang.IllegalArgumentException: The node is not valid source node, node=[HEAD: null] at org.netbeans.modules.visualweb.html.model.HtmlModel.validateSourceNode(HtmlModel.java:523 at org.netbeans.modules.visualweb.html.model.HtmlModel.validateComponentNode(HtmlModel.java: at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.validateComponen at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.getNodeRepresent at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent$NbComponentNodeC at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent$NbComponentNodeC 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) [catch] 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$Default.createSnapshot(EntrySupport.java:141) at org.openide.nodes.NodeEvent.(NodeEvent.java:59) at org.openide.nodes.Node.fireNodeDestroyed(Node.java:1111) at org.openide.nodes.Children$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.u at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelComponent$ComponentChildren.u at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelComponent$ComponentChildren.s at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelComponent$ComponentChildren.a at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelComponent.setVisualWebCompone at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelImpl.setCurrentModel(Navigato at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelImpl.updateModel(NavigatorPan at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelImpl.access$000(NavigatorPane at org.netbeans.modules.visualweb.navigator.impl.NavigatorPanelImpl$NavigatorLookupListener. at sun.reflect.GeneratedMethodAccessor52.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(NavigatorCo at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:197) at org.netbeans.modules.navigator.NavigatorController.updateContext(NavigatorController.java at org.netbeans.modules.navigator.NavigatorController.updateContext(NavigatorController.java at org.netbeans.modules.navigator.NavigatorController.access$900(NavigatorController.java:99 at org.netbeans.modules.navigator.NavigatorController$ActNodeSetter.run(NavigatorController. 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.pumpEventsForFilter(EventDispatchThread.java:178) at java.awt.Dialog$1.run(Dialog.java:1046) at java.awt.Dialog$3.run(Dialog.java:1098) at java.security.AccessController.doPrivileged(Native Method) at java.awt.Dialog.show(Dialog.java:1096) at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:863) at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:897) at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:885) at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:109) at org.openide.util.Mutex.doEventAccess(Mutex.java:1355) at org.openide.util.Mutex.readAccess(Mutex.java:268) at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:870) at java.awt.Component.show(Component.java:1447) at java.awt.Component.setVisible(Component.java:1400) at java.awt.Window.setVisible(Window.java:824) at java.awt.Dialog.setVisible(Dialog.java:986) at org.netbeans.modules.visualweb.html.pagelayout.HtmlPageLayoutChooserDialog.showDialog(Htm at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.pickFromTemplate at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.sourceDomLoadFin at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.access$600(HtmlV at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent$3$1.run(HtmlVisu 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.pumpEventsForFilter(EventDispatchThread.java:178) at java.awt.Dialog$1.run(Dialog.java:1046) at java.awt.Dialog$3.run(Dialog.java:1098) at java.security.AccessController.doPrivileged(Native Method) at java.awt.Dialog.show(Dialog.java:1096) at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:863) at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:897) at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:885) at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:109) at org.openide.util.Mutex.doEventAccess(Mutex.java:1355) at org.openide.util.Mutex.readAccess(Mutex.java:268) at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:870) at java.awt.Component.show(Component.java:1447) at java.awt.Component.setVisible(Component.java:1400) at java.awt.Window.setVisible(Window.java:824) at java.awt.Dialog.setVisible(Dialog.java:986) at org.netbeans.modules.visualweb.html.pagelayout.HtmlPageLayoutChooserDialog.showDialog(Htm at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.pickFromTemplate at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.sourceDomLoadFin at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent.access$600(HtmlV at org.netbeans.modules.visualweb.html.designsupport.HtmlVisualWebComponent$3$1.run(HtmlVisu 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)