Question: Help! - Nonexistent user locking an assignment

We have the following situation.   An assignment whose finish date has passed is locked and if (for instance) one tries to edit it one is told that there is an active user taking it or credit.    We have force-graded all active assignments, and the gradebook now shows no  assignments in progress.      We can not find any way to unlock this assignment.     (And the assignment is not inherited from or to another class.)

Has anybody had this situation and found a solution?  We'd be grateful for any help.


Please Wait...