hi all
i have set up the necessary checks to catch duplicate invoices under path MM-LIV- incoming invoice-set check for duplicate invoices. and in vendor master i flagged the "chk double inv" and in PO ticked "GR-Bsd IV". but the duplicate check doesn't seem to work, i can still enter an invoice which already been booked previously. i couldn't figure it out! anyone can help me on this issue? thanks.