Solution : https://service.sap.com/sap/support/notes/147252 (SAP Service marketplace login required)
Key words :
additional key words mapping, calling function module -transaction_handling-, correct account assignment information, account assignment object, lower case 'l', account assignment, apo system, transaction id, sales order, order number
Related Notes :
| 367080 | Backorder proc.: temp. quantity assignments not deleted |