[rules-users] Problem opening several views in 4.0 MR3 Eclipse

[Eric Miles]

When I attempt to open several views (Working Memory, Agenda, Global,
etc) within an JBoss Rules enabled Eclipse, I receive the following
error:

java.lang.NoClassDefFoundError:
org/eclipse/debug/internal/ui/contexts/provisional/IDebugContextListener
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
	at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:161)
	at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:501)
	at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:471)
	at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClassImpl(ClasspathManager.java:430)
	at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:413)
	at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:189)
	at
org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:340)
	at
org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:408)
	at
org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:369)
	at
org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:357)
	at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:83)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
	at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:161)
	at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:501)
	at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:471)
	at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClassImpl(ClasspathManager.java:430)
	at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:413)
	at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:189)
	at
org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:340)
	at
org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:408)
	at
org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:369)
	at
org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:357)
	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:289)
	at
org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)
	at
org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1269)
	at
org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:160)
	at
org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:788)
	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.createExtension(WorkbenchPlugin.java:235)
	at
org.eclipse.ui.internal.registry.ViewDescriptor.createView(ViewDescriptor.java:69)
	at
org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:327)
	at
org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:227)
	at
org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:592)
	at org.eclipse.ui.internal.Perspective.showView(Perspective.java:2077)
	at
org.eclipse.ui.internal.WorkbenchPage.busyShowView(WorkbenchPage.java:1018)
	at org.eclipse.ui.internal.WorkbenchPage.access
$18(WorkbenchPage.java:999)
	at org.eclipse.ui.internal.WorkbenchPage
$19.run(WorkbenchPage.java:3666)
	at
org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67)
	at
org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:3663)
	at
org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:3639)
	at
org.eclipse.ui.handlers.ShowViewHandler.openView(ShowViewHandler.java:165)
	at
org.eclipse.ui.handlers.ShowViewHandler.openOther(ShowViewHandler.java:109)
	at
org.eclipse.ui.handlers.ShowViewHandler.execute(ShowViewHandler.java:77)
	at
org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:239)
	at
org.eclipse.core.commands.Command.executeWithChecks(Command.java:475)
	at
org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:429)
	at
org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:165)
	at
org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
	at org.eclipse.ui.internal.ShowViewMenu$3.run(ShowViewMenu.java:128)
	at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
	at
org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545)
	at org.eclipse.jface.action.ActionContributionItem.access
$2(ActionContributionItem.java:490)
	at org.eclipse.jface.action.ActionContributionItem
$5.handleEvent(ActionContributionItem.java:402)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1101)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3319)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
	at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
	at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
	at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153)
	at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
	at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
	at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
	at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
	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)

Anyone know what's going on?  I'm running the IDE feature version
4.0.0.12865MR3, Eclipse 3.3, Sun JDK 1.5.0_12 on Fedora 7.

Thanks,
Eric
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