Solution : https://service.sap.com/sap/support/notes/878970 (SAP Service marketplace login required)
Key words :
define bseg-umsks = 'a', final info accountsyou find, intermediate status logic - contrary, open customer/vendor lines, intermediate status logic, intermediate status switch, terms flqasset-xopend, attached correction adjusts, sample function flq_sample_modify_inv, assignment transaction flqad
Related Notes :
| 685341 | Intermediate statuses for assignment of liquidity item |
| 614240 | FLQAD: Rules for the second step |