Solution : https://service.sap.com/sap/support/notes/189672 (SAP Service marketplace login required)
Key words : 
additional key words emu, extremely high differences, fixed point arithmetic, local currency changeover, report reucldoc activate, fi documents changeover, report reucldoc, fi documents, report rfewa009, converted amounts
Related Notes : 
       
| 179373 | Additional info for upgrade to Rel.4.6B | 
| 121626 | Euro LC changeover:important Support Packages info. |