Hi Gavin,

I have taken latest source code from 
http://tapestrytools.googlecode.com/svn/trunk.

I am trying to modify the plug-in as per the project specific requirements.

I am using Eclipse version =3.7.0 to modify the plug-in. when I run plug-in 
from the eclipse, it will open a new eclipse instance. When I open tml file in 
new eclipse instance then it will generate below error.

Any idea Gavin why I am getting this error?


!ENTRY org.eclipse.osgi 2 0 2012-05-16 14:57:15.912
!MESSAGE The activator org.eclipse.wst.xml.ui.internal.XMLUIPlugin for bundle 
org.apache.tapestrytools.ui is invalid
!STACK 0
org.osgi.framework.BundleException: The activator 
org.eclipse.wst.xml.ui.internal.XMLUIPlugin for bundle 
org.apache.tapestrytools.ui is invalid
      at 
org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator(AbstractBundle.java:171)
      at 
org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:679)
      at 
org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
      at 
org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:299)
      at 
org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:440)
      at 
org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:268)
      at 
org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:236)
      at 
org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1207)
      at 
org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174)
      at 
org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)
      at 
org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
      at 
org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)
      at 
org.eclipse.wst.sse.ui.internal.ExtendedConfigurationBuilder$1.run(ExtendedConfigurationBuilder.java:115)
      at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
      at 
org.eclipse.wst.sse.ui.internal.ExtendedConfigurationBuilder.createExtension(ExtendedConfigurationBuilder.java:112)
      at 
org.eclipse.wst.sse.ui.internal.ExtendedConfigurationBuilder.createConfigurations(ExtendedConfigurationBuilder.java:149)
      at 
org.eclipse.wst.sse.ui.internal.ExtendedConfigurationBuilder.getConfigurations(ExtendedConfigurationBuilder.java:218)
      at 
org.eclipse.wst.sse.ui.internal.ExtendedConfigurationBuilder.getConfiguration(ExtendedConfigurationBuilder.java:190)
      at 
org.eclipse.wst.sse.ui.StructuredTextEditor.createSourceViewerConfiguration(StructuredTextEditor.java:1678)
      at 
org.eclipse.wst.sse.ui.StructuredTextEditor.updateSourceViewerConfiguration(StructuredTextEditor.java:3438)
      at 
org.eclipse.wst.sse.ui.StructuredTextEditor.update(StructuredTextEditor.java:3074)
      at 
org.eclipse.wst.sse.ui.StructuredTextEditor.setModel(StructuredTextEditor.java:2971)
      at 
org.eclipse.wst.sse.ui.StructuredTextEditor.doSetInput(StructuredTextEditor.java:1940)
      at 
org.eclipse.ui.texteditor.AbstractTextEditor$19.run(AbstractTextEditor.java:3200)
      at 
org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
      at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
      at 
org.eclipse.jface.window.ApplicationWindow$1.run(ApplicationWindow.java:759)
      at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
      at 
org.eclipse.jface.window.ApplicationWindow.run(ApplicationWindow.java:756)
      at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2642)
      at 
org.eclipse.ui.texteditor.AbstractTextEditor.internalInit(AbstractTextEditor.java:3218)
      at 
org.eclipse.ui.texteditor.AbstractTextEditor.init(AbstractTextEditor.java:3245)
      at 
org.eclipse.wst.sse.ui.StructuredTextEditor.init(StructuredTextEditor.java:2595)
      at 
org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:237)
      at 
org.eclipse.ui.part.MultiPageEditorPart.addPage(MultiPageEditorPart.java:211)
      at 
org.eclipse.wst.xml.ui.internal.tabletree.XMLMultiPageEditorPart.addSourcePage(XMLMultiPageEditorPart.java:509)
      at 
org.eclipse.wst.xml.ui.internal.tabletree.XMLMultiPageEditorPart.createPages(XMLMultiPageEditorPart.java:764)
      at 
org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:348)
      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:1245)
      at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1198)
      at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1597)
      at org.eclipse.ui.internal.PartStack.add(PartStack.java:493)
      at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:103)
      at org.eclipse.ui.internal.PartStack.add(PartStack.java:479)
      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:808)
      at 
org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:707)
      at 
org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:666)
      at 
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2942)
      at 
org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2850)
      at 
org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2842)
      at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2793)
      at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
      at 
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2789)
      at 
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2773)
      at 
org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2764)
      at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651)
      at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610)
      at 
org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:355)
      at 
org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:164)
      at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:249)
      at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:228)
      at 
org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:275)
      at 
org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:251)
      at 
org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:376)
      at 
org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:538)
      at 
org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48)
      at 
org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:866)
      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
      at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
      at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
      at 
org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:864)
      at 
org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1152)
      at 
org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1256)
      at 
org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:275)
      at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:269)
      at 
org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:309)
      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
      at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
      at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
      at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
      at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
      at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
      at 
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      at 
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
      at 
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
      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:344)
      at 
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
      at org.eclipse.equinox.launcher.Main.main(Main.java:1386)
Caused by: java.lang.ClassNotFoundException: 
org.eclipse.wst.xml.ui.internal.XMLUIPlugin

Regards,
Mahendra Athneria




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