Solution : https://service.sap.com/sap/support/notes/340028 (SAP Service marketplace login required)
Key words :
additional key words bbp, /3 back-end purchase order, /3 purchase order structure po_item_add_data, additional item data, bbp shopping basket, source code analogously, purchase order, shopping basket, source code, solution implement
Related Notes :
158607 | BAPI_PO_CREATE does not transfer additional data |