ZW 6.5 on NW 6.5 server.

We set up a group policy for users on our XP machines. It worked fine.
But when we go back to change the policy, MMC won't come up. Instead we
get the error:

"The group policy which you are attempting to edit is currently being
edited by another user."

The policy file on the server isn't being held open by anyone. Anybody
know what the problem is?

David Last