that is not what you wanted. You leave yourself open to
The user can simply accept it or changeWhat I want to do is to prevent that somebody will define a wrong numberas stated, should be assigned in the form before update event so should not need to be checked - particularly if this is a single user systemAccess would check the number once again when the record is entered and should be written in table
We are 16 posts in trying to understand what you require - you are now implying something different from where you started. programming is very 'boolean' either you want something, or you don't.