Solution : https://service.sap.com/sap/support/notes/317972 (SAP Service marketplace login required)
Key words :
mmda0001 logical message type orders, additional key words vendor, send purchase orders, purchase order items, plant assignment exit_saplmmda_001, field e1edka1-lifnr, field lifnr, vendor number, segment e1edka1, vendor address
Related Notes :
374358 | EDI: purchase order, plant not in ship-to address |
203307 | EDI:Purchase order (ORDERS IDoc), vendor not filled |