Description David Whiteman 2007-04-10 17:31:36 EDT

I had 2.0M1 installed in my Eclipse 3.2.2 workspace.  When I use the update manager to upgrade Mylar, and I accept the license agreement and restart Eclipse, suddenly my task list contains the following error:

java.lang.ClassNotFoundException: org.eclipse.mylar.internal.tasks.ui.views.TaskListView
	at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:402)
	at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:347)
	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:83)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:278)
	at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1245)
	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:147)
	at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:759)
	at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
	at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51)
	at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:242)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)
	at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:238)
	at org.eclipse.ui.internal.registry.ViewDescriptor.createView(ViewDescriptor.java:69)
	at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:292)
	at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:197)
	at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:566)
	at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:290)
	at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:525)
	at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:140)
	at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268)
	at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
	at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:394)
	at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1144)
	at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:620)
	at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:532)
	at org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:562)
	at org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:244)
	at org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:815)
	at org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPage.java:2436)
	at org.eclipse.ui.internal.WorkbenchWindow$6.run(WorkbenchWindow.java:2616)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)
	at org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow.java:2597)
	at org.eclipse.ui.internal.WorkbenchWindow.restoreState(WorkbenchWindow.java:1982)
	at org.eclipse.ui.internal.Workbench.doRestoreState(Workbench.java:2873)
	at org.eclipse.ui.internal.Workbench.access$14(Workbench.java:2821)
	at org.eclipse.ui.internal.Workbench$20.run(Workbench.java:1697)
	at org.eclipse.ui.internal.Workbench.runStartupWithProgress(Workbench.java:1437)
	at org.eclipse.ui.internal.Workbench.restoreState(Workbench.java:1695)
	at org.eclipse.ui.internal.Workbench.access$12(Workbench.java:1666)
	at org.eclipse.ui.internal.Workbench$18.run(Workbench.java:1545)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.ui.internal.Workbench.restoreState(Workbench.java:1489)
	at org.eclipse.ui.internal.WorkbenchConfigurer.restoreState(WorkbenchConfigurer.java:183)
	at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:702)
	at org.eclipse.ui.internal.Workbench.init(Workbench.java:1101)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1863)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:422)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
	at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
	at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
	at org.eclipse.core.launcher.Main.run(Main.java:977)
	at org.eclipse.core.launcher.Main.main(Main.java:952)

When I try to do a bug search using the Search view and switch to the Task tab, it says there are no available repositories, and the Repository combo box is empty.  When I go to Manage Configuration > Features and switch back to 2.0M1 (Replace With > Another Version), everything is working fine again.