I have a field that requires not empty and must be filled with one of two values from a pop up. It is one database that houses two companies. I have a message that pops up saying "Please choose a company"

My problem the validation message is popping up on another field when tabbed to. The message is coming up on a date field that I use to set my appointments. I have checked the date field and no validation is set. With the date field I am using Brian Dunnings Calsnap, which is a script button that pops up a little calendar and auto enters the date chosen, which is pretty cool I may add. I checked the script and can not see anything that would cause the validation message "Please choose a company" come up. I just can't figure it out. any suggestions?

I think the problem you are having is related to this:

Your tab order on your layout is not set correctly. The field you are starting at on the layout is not the field with the validation rules. Fix the tab order or add a script step to go to the correct starting field.

I remember this happening to me before, so I think this is what is happening.