Solution : https://service.sap.com/sap/support/notes/1020056 (SAP Service marketplace login required)
Key words :
date class/interface cl_gos_service event commit_required 6, generic object services, select detail view, select change mode, class cl_po_header_handle_mm, event handler, change mode, change transaction, manual change, code change
Related Notes :
| 1140398 | Transferring docs from purchase requsition to purchase order |
| 913251 | GOS redesigned in Enjoy Transactions ME21N, ME51N |