Solution : https://service.sap.com/sap/support/notes/137535 (SAP Service marketplace login required)
Key words :
system generates error message vl123 'delivery group nnn, additional key words vl10, incomplete delivery groups, source code corrections, delivery group, delivery creation, delivery items, advance corrections, collective processing, sales order
Related Notes :
| 111653 | Delivery groups are split in VL01 without message |
| 72688 | Also deleting incomplete delivery groups in VL01 |
| 52694 | Coll. note for quantity correl. in Rel. 3.0C-4.5B |