Solution : https://service.sap.com/sap/support/notes/52006 (SAP Service marketplace login required)
Key words :
symptom posting parked invoices/reversing invoices, additional key words, prerequisites program error, purchase order assigned, purchase order, account assignment, message m8001 ', postable automatically', release status 3, solution corrected
Related Notes :
| 42828 | MR44/MR08 with OrdRef and acct assignmt changeable |