Eclipse Tidy

I just received the exact same symptom on a Windows XP machine, Eclipse
Version: 3.4.1
Build id: M20080911-1700. I have numerous errors in the log file
!ENTRY org.eclipse.jface 4 0 2009-12-09 15:38:23.638
!MESSAGE Undefined context while filtering dialog/window contexts
!STACK 0
org.eclipse.core.commands.common.NotDefinedException: Cannot get the
parent identifier from an undefined context. net.sf.eclipsetidy.ActionSet
at
org.eclipse.core.commands.contexts.Context.getParentId(Context.java:201)
at
org.eclipse.jface.bindings.BindingManager.createFilteredContextTreeFor(BindingManager.java:825)
at
org.eclipse.jface.bindings.BindingManager.recomputeBindings(BindingManager.java:1721)
at
org.eclipse.jface.bindings.BindingManager.contextManagerChanged(BindingManager.java:689)
at
org.eclipse.core.commands.contexts.ContextManager.fireContextManagerChanged(ContextManager.java:152)
at
org.eclipse.core.commands.contexts.ContextManager.addActiveContext(ContextManager.java:96)
at
org.eclipse.ui.internal.contexts.ContextAuthority.updateContext(ContextAuthority.java:765)
at
org.eclipse.ui.internal.contexts.ContextAuthority.activateContext(ContextAuthority.java:179)
at
org.eclipse.ui.internal.contexts.ContextService.activateContext(ContextService.java:88)
at
org.eclipse.ui.internal.contexts.SlaveContextService.doActivateContext(SlaveContextService.java:279)
at
org.eclipse.ui.internal.contexts.SlaveContextService.activateContext(SlaveContextService.java:122)
at
org.eclipse.ui.internal.ActionSetManager$1.propertyChanged(ActionSetManager.java:89)
at
org.eclipse.ui.internal.ActionSetManager.firePropertyChange(ActionSetManager.java:116)
at
org.eclipse.ui.internal.ActionSetManager.showAction(ActionSetManager.java:138)
at
org.eclipse.ui.internal.ActionSetManager.change(ActionSetManager.java:194)
at
org.eclipse.ui.internal.WorkbenchPage.perspectiveActionSetChanged(WorkbenchPage.java:3599)
at org.eclipse.ui.internal.Perspective.addAlwaysOn(Perspective.java:896)
at
org.eclipse.ui.internal.Perspective.turnOnActionSets(Perspective.java:1789)
at
org.eclipse.ui.internal.WorkbenchWindow$1.addExtension(WorkbenchWindow.java:503)
at
org.eclipse.ui.internal.registry.UIExtensionTracker$2.run(UIExtensionTracker.java:58)
at
org.eclipse.ui.internal.UILockListener.doPendingWork(UILockListener.java:155)
at org.eclipse.ui.internal.UISynchronizer$3.run(UISynchronizer.java:158)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:133)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3800)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3425)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
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:386)
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:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)

Hello Pierre,

I just did an install from scratch, then tried to activate HTMLTidy ->
Format from the menu.

Unfortunately no errors we generated in the workspace log file.

Some similar issues have been reported by the past (see ID 1811153 &
1706856), but I couldn't reproduce them. Since I don't have OS X Snow
Leopard, I won't be able to reproduce this one either.

Do you have Eclipse error logs for this issue?

Set prio 9/assigned (showstopper) - tool does not function in this env.