SAP Function Module search on MR_PO
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MR_POSTING_GENERATE - Posting logic invoice verification
MR_POST_PP_INVOICE - Post parked document
MR_PO_DISPLAY - NOTRANSL: Bestellung / Lieferplan anzeigen aus der Rechnungsprüfung
MR_PO_SUPPLEMENT_DISPLAY - NOTRANSL: Bestellanhang melden
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