Solution : https://service.sap.com/sap/support/notes/1255483 (SAP Service marketplace login required)
Key words : 
payment medium workbench solution implement, source code corrections, print formatting transfers, print settings, report sapfpaym, transaction fbpm, system generates, dump dynpro_field_conversion, information, note 1046693
Related Notes : 
       
| 1468373 | |
| 1310720 | Collection Note for Unicode Systems with different endianess | 
| 1046693 | Dump DYNPRO_FIELD_CONVERSION for report SAPFPAYM |