Solution : https://service.sap.com/sap/support/notes/71722 (SAP Service marketplace login required)
Key words :
symptom error message lb020 ', error message lb020, additional key words, total split quantity, split quantity, split item, requirement quantity', requirement quantity, selection screen, batch determination
Related Notes :
| 64266 | Workaround: Batch determination w.over-reference |
| 53662 | General split for batch determination as modification |