I mean - without looking at the form it is hard to guess, but the rules in the screenshot look like something is setting a field named "Supplier" - whether that's the main data source field, I don't know. You could click on it and see. My guess is that when the "...VendorsUpdated" data connection executes, it sets the Supplier to the SupplierName returned from that data connection, and that, for some reason is blank. It seems like a bit of a design flaw, if that's the case, because if you are letting a user enter data in a field, generally you wouldn't later on overwrite that data. Form Load rules are under the Data tab in the ribbon.
Hilary Stoupa
