Solution : https://service.sap.com/sap/support/notes/878466 (SAP Service marketplace login required)
Key words :
type ext_price type coexprice2, export parameter ext_price, changing parameter ext_price, customer enhancement saplkcoc, function module exit_saplkcoc_001, attached program correction, activity prices exist, external price entered, external price, program error
Related Notes :
| 688883 | Confirmation with price 0: Message BK 057 |