Solution : https://service.sap.com/sap/support/notes/391685 (SAP Service marketplace login required)
Key words :
additional key words mrm_duplicate_invoice_check, symptom transaction 'enter invoice ', set message m8462, duplicate invoice, transaction mira, press enter, press 'enter', error message, warning message, incoming invoices
Related Notes :
| 394316 | EDI: Check for duplicate invoice not possible |