Upon opening a form (with some heavy VBA) I get a dialog that says: "You cannot add or change a record because a related record is required in table 'TableName'." The table-data is all fine though, and I *CAN* add or change records in the form. This started happening when I cleaned out the backend to start the system with some fresh data. But out of curiosity, has anyone experienced this before? Any ideas on what to check for? Please help! TIA..