Has any one had experience with this nice little error message? I have a db with 2 tables that records are written to them one by a form the other by a subform of that form. As the users try and write new records it tries t over write the old record and gives them a duplicate value error message. Then in the table in show a record with every field saying error#. then when you click o the record or try to edit it it gives you the Not a valid bookmark error. Any idea why this is happening? Thanks.