Solution : https://service.sap.com/sap/support/notes/372858 (SAP Service marketplace login required)
Key words :
additional key words bseg-hzuon, clearing document line item, required entry field, attached program corrections, bseg-augbl = ' ', customer posts, outgoing payment, incoming payment, assignment number, open items
Related Notes :
| 190879 | FB05: fields not ready for input after simulation |