Solution : https://service.sap.com/sap/support/notes/636203 (SAP Service marketplace login required)
Key words :
system generates message iw405 'order number &, external number assignment, terms bapi_alm_order_maintain reason, order bapi, create orders, program error, solution implement, program correction, prerequisites
Related Notes :
| 708508 | Downgrade BAPI_ALM_ORDER_MAINTAIN -> errors |