Voucher Match is requiring Branch / Plant

JDE E1 version 9.2

Using P4314 to create a voucher. The PO is filled in but when the Form Exit "Receipts To Match" is selected I get the "Currency Exchange Rate Not Found" and will not open the receipts window for matching. If I populate the Branch/Plant and then click on the Form Exit it works fine and pulls up the open receipts. The problem is our A/P people do not know the Branch/Plant so this requires extra steps to open the PO and find that before processing. Is it really required to be populated or is this a symptom of a different problem?