Solution : https://service.sap.com/sap/support/notes/1073204 (SAP Service marketplace login required)
Key words :
source code corrections contained, system issues message vl 444, xl_exit nodel reason, attached correction instructions, original order item, terms vl 444, warning message, information message, delivery item, billing-relevance
Related Notes :
| 444744 | Dely items can be deletd despite of billing (billing-rel. G) |