I tried:
Expr1: IIf(IsNull([tblPendReq]![intRmID]),[tblRoomName]![txtRoomName],[tblRoomType]![txtRoomType])
I have 3 tables; PendReq (primary table for this form)
RoomName(key=intRmKey), & RoomType(key=intRmTypeID).
PendReq has a tracking Number, RoomType, and room Name fields. (RoomName can be blank)
When I link the keys for all subtables, I only get records where RoomName has a value. When I don't link the key to roomName, I get a record for each PendReq, duplicated for each RoomName in RoomName table.
What I want is to show each record in PendReq. When RoomName is present, I want to show that, otherwise I want to show RoomType.