def notifyException(ob, action, exc):
    """ Notifies this workflow that an action failed.

        o 'ob' is the target object of the action.

        o 'action' is a string identifying the failed action;
          usually it corresponds to a method name.

        o 'exc' is the 'sys.exc_info' triple for the exception.

        o Invoked by the portal_workflow tool.

        o Permission:  Private (Python only)
        """
