Solution : https://service.sap.com/sap/support/notes/722193 (SAP Service marketplace login required)
Key words : 
terms unicode mdmp rfc text corruption rfc_conversion_struc rfc_conversion_table rscplangcplistgetcptry tcp0i rfcdes system_failure reason, server unicode system converts text data incorrectly, rfc legacy caller language-code page list, east european single code page 1401 system, title changerfc legacy mdmp callers, single letter/digit language keys, correctly configured system multiple destinations defined, identical language/code page configurations, side generates short dump rfc_conversion_struc, entering mdmp destination system information
Related Notes : 
       
| 1319517 | Unicode Collection Note | 
| 1021459 | Conversion behavior of the RFC library | 
| 920831 | RFC with inactive text language | 
| 814707 | Troubleshooting for RFC connections Unicode/non-Unicode | 
| 809279 | RFC non-Unicode to Unicode with unknown text language | 
| 765475 | Unicode Conversion: Troubleshooting | 
| 647495 | RFC for Unicode ./. non-Unicode Connections | 
| 547444 | RFC Enhancement for Unicode ./. non-Unicode Connections |