Solution : https://service.sap.com/sap/support/notes/67953 (SAP Service marketplace login required)
Key words :
symptom canceling invoices/posting parked invoices, similar problem occurs, additional key words, prerequisites program error, parked document, purchase order, account assignment, respective invoice, account assignments, advance corrections
Related Notes :
| 50646 | MR44/MR08: Customer-specific acct assignment fields |