Solution : https://service.sap.com/sap/support/notes/390750 (SAP Service marketplace login required)
Key words :
type pass valueconfirmation type bapi_sign 'x' <<< insert 2, entered billing document number exists, bor object type vbrk, entered document key exists, function module checks, bapi_billingdoc_confirm function module, bapi_billingdoc_existencecheck function module, invoice document, object instance, function builder
Related Notes :
| 891700 | No display of archived billing documents with BAPI |
| 837195 | OAOR: Search for optically archived grouped outputs |
| 500515 | Missing BOR object type assignment in T681Z |
| 390352 | Original document for accounting document not found |
| 390244 | No processing of invoice lists with BAPI |