Solution : https://service.sap.com/sap/support/notes/1332137 (SAP Service marketplace login required)
Key words :
abap short dump dynpro_field_conversion occurs, display invoice document, create invoice documents, quantity check correctly, reversal quantity greater, current invoice quantity, parked credit memo, error message m8 080, dynpro_field_conversion reason, credit memo
Related Notes :
| 1361806 | MIR4 Runtime Errors DYNPRO_MSG_IN_HELP |
| 491074 | MIRO: Runtime error DYNPRO_FIELD_CONVERSION |