>Thanks for the info, but...
>
>When I try FOPEN() it returns -1 regardless of the lock state of the table. How would I determine locked vs unlocked with this function?
>
>Sorry to be so ignorant on this.

Are you sure, both DS use this table in shared mode? Close both forms and check fopen() for this file in the command window. Perhaps, you didn't pass the whole file name (with the correct path).