Solution : https://service.sap.com/sap/support/notes/913032 (SAP Service marketplace login required)
Key words :
'change billing document' transaction, 'n' posting status, badi_sd_to_fm function module, general error log, log 'document 90001234 saved, posting document due, vf 050 information message, 'release billing documents, accounting document generated, accounting' transaction
Related Notes :
| 925647 | VFX3: No success message or error log |