Solution : https://service.sap.com/sap/support/notes/117916 (SAP Service marketplace login required)
Key words :
system issues error message vl002, additional key words vf02, status segment vbuk, respective billing type, number range interval, billing document, number range, document flow, document exists, subsequent documents
Related Notes :
| 142368 | Segment VBUK missing in billing document |