Solution : https://service.sap.com/sap/support/notes/660042 (SAP Service marketplace login required)
Key words :
materials management -> purchasing -> confirmations -> set, quantity difference profile, attached correction instructions, internal confirm categs, respective inbound delivery, return deliveries reason, confirmation category 'la', return delivery, confirmation categories, transaction qm01
Related Notes :
711528 | MBRL Error ME 188 issued in RETURN_EKES_FUELLEN |
603387 | Composite SAP Note for problems with return deliveries |
588177 | EKES update for return delivery with outbound deliveries |