Solution : https://service.sap.com/sap/support/notes/72651 (SAP Service marketplace login required)
Key words :
enter import parameter erkrs = 's001' 5, additional key words fi/, 'sales document item' fields, call function module 'rke_generate_interface_act', enter function module, sales order item, characteristic usage function, abap/4 function library, 'sales order number', sales order number
Related Notes :
| 35367 | Third-party processing: error KI235, missing costs |