java.lang.IllegalArgumentException: 
	at org.eclipse.core.runtime.Assert.isLegal(Assert.java:63)
	at org.eclipse.core.runtime.Assert.isLegal(Assert.java:47)
	at org.eclipse.ui.part.EditorPart.setInput(EditorPart.java:224)
	at org.jboss.tools.jst.web.tiles.ui.editor.TilesGuiEditor.setInput(TilesGuiEditor.java:40)
	at org.jboss.tools.common.model.ui.editor.DefaultEditorPart.init(DefaultEditorPart.java:89)
	at org.jboss.tools.common.editor.AbstractSectionEditor.init(AbstractSectionEditor.java:139)
	at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:237)
	at org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:211)
	at org.jboss.tools.jst.web.tiles.ui.editor.TilesCompoundEditor.createGuiPage(TilesCompoundEditor.java:66)
	at org.jboss.tools.jst.web.tiles.ui.editor.TilesCompoundEditor.doCreatePages(TilesCompoundEditor.java:50)
	at org.jboss.tools.common.editor.ObjectMultiPageEditor.createPages(ObjectMultiPageEditor.java:239)
	at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:348)
	at org.jboss.tools.common.model.ui.editor.EditorPartWrapper.createPartControl(EditorPartWrapper.java:176)
	at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:670)
	at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:465)
	at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
	at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313)
	at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180)
	at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270)
	at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
	at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473)
	at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1254)
	at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1207)
	at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1606)
	at org.eclipse.ui.internal.PartStack.add(PartStack.java:497)
	at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:103)
	at org.eclipse.ui.internal.PartStack.add(PartStack.java:483)
	at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:112)
	at org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.java:63)
	at org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:225)
	at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:213)
	at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:778)
	at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:677)
	at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:638)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2860)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2768)
	at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2760)
	at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2711)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2707)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2691)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2674)
	at org.jboss.tools.common.editor.OpenEditorWizard.execute(OpenEditorWizard.java:97)
	at org.jboss.tools.common.model.handlers.OpenEditorHandler.executeHandler(OpenEditorHandler.java:31)
	at org.jboss.tools.common.meta.action.impl.XActionImpl.executeHandler(XActionImpl.java:65)
	at org.jboss.tools.common.model.ui.action.XModelObjectAction.actionPerformed(XModelObjectAction.java:96)
	at org.jboss.tools.common.model.ui.action.XModelObjectActionInvoker.execute(XModelObjectActionInvoker.java:36)
	at org.jboss.tools.common.meta.action.XActionInvoker.invoke(XActionInvoker.java:53)
	at org.jboss.tools.common.meta.action.XActionInvoker.invoke(XActionInvoker.java:40)
	at org.jboss.tools.common.model.ui.select.SelectObjectWizard.openEditor(SelectObjectWizard.java:139)
	at org.jboss.tools.common.model.ui.select.SelectObjectWizard.execute(SelectObjectWizard.java:47)
	at org.jboss.tools.common.model.util.FindObjectHelper.findModelObject(FindObjectHelper.java:40)
	at org.jboss.tools.common.model.files.handlers.CreateFileSupport$1.run(CreateFileSupport.java:241)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3515)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3164)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:616)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1407)