I may be off base here on my design but:
The form opens in an update mode - with the first record in the file chosen. I can move to a different record and make changes if I want OR click on an ADD RECORD button. The check box for the COPY is on the screen. Now when I am in add mode, I select a customer from the combo box and soon as I do that I get the error messages referenced. HOWEVER, IF I click the COPY Box b/4 I choose the customer and enter the rest of new record, it goes thru, then when the next add record screen come up - the customer IS selected. Some kind of a timing logic error on my part!