Solution : https://service.sap.com/sap/support/notes/48679 (SAP Service marketplace login required)
Key words :
symptom error message rw012 'error, additional key words subsequent settlement, credit-side settlement accounting, error message rw 012, -mentioned error occurs, credit memo document, structuring reference fields, volume-based rebate, 'edit -> reset cond, invoice verification document
Related Notes :
40147 | Collective note: Subsequent settlement (Purch.) Release 3.0 |