11.2.1a The handler Novell.Zenworks.ActionManager.Standalone

When trying to run a vbs script on user logout to delete all printers we are getting lots of the following events now showing up on the workstations

The handler Novell.Zenworks.ActionManager.StandaloneHandlerHan dler threw the following exception: Object reference not set to an instance of an object.

All searches saying this should have already been fixed in previous versions ?

Any ideas whats causing the errors ?