I read the other messsages about this issue and decided on using: 1. Validation rule: is not null 2. Validation text: my own message "please select a building" Problem: When I test this out.. I save the record without selecting a building and I receive my message.. I then try to select a building and select save record and I get a LONG message stating: The expression [Buildings] you entered in the form control's ValidationRule property contains the error The object doesn't contain the Automation object 'Buildings.'... What does this mean?? Please help!!