Solution : https://service.sap.com/sap/support/notes/323207 (SAP Service marketplace login required)
Key words :
additional key words me21n, partner dialog box, transaction me21n, dialog box, partner role, partner determination, purchase order, vendor master, system generates, contract reference
Related Notes :
420058 | ME21N Error ME366 after changing the document type |
413207 | ME21N: Error message from partner determination is lost |
401734 | ME21N Stock transport order, partners disappear |
329405 | ME21N: Partner dialog box with PReq w/ contract disp twice |