Solution : https://service.sap.com/sap/support/notes/77111 (SAP Service marketplace login required)
Key words :
error message v1335 appears 'system error, additional key words schedule line, change sales order, delivery groups exist, order finish dateva01, procurement detail screen, complete delivery indicator, schedule line &, program error, complete delivery
Related Notes :
| 77056 | VA02, network: schedule line disappears, EM V1322 |
| 73229 | Assembly: schedule lines disappear in del.group |