Payables Open Interface Import populating Invoice Source in all uppercase "MANUAL INVOICE ENTRY."

Payables Interface Import Populating Invoice with Source in all uppercase "MANUAL INVOICE ENTRY." while entering invoice manually from Invoice workbench forms populated the Source column in title case "Manual Invoice Entry", having invoice Source column in all uppercase("MANUAL INVOICE ENTRY") resulted to Approval process "Not Required".

I tried populating invoice interface table Source column in title case("Manual Invoice Entry"), but "Payables Interface Import" program ended in Completed Error, with the error below, but strange it created the invoice despite with the error.

REP-1401: 'cf_source_nameformula': Fatal PL/SQL error occurred.
ORA-01403: no data found

Any Idea how to fix the issue, or should I create an SR?