Solution : https://service.sap.com/sap/support/notes/747615 (SAP Service marketplace login required)
Summary : 
      
Key words : 
application serverwith open dataset textmode, 9000-9000t-2103t9000-9000t-ct0aonc, sap code pages fits, microsoft latin1 code page 1252, sap code page xxxx, sap code page yyyy, western european r3 system, terms open dataset, sap code page, -unicode r3 system
Related Notes : 
       
| 1319517 | Unicode Collection Note | 
| 1312142 | Data transfer: Runtime error CONVT_CODEPAGE | 
| 788449 | Byte-order Marks in UTF-8 Files | 
| 765373 | CONVT_CODEPAGE runtime error during file upload | 
| 752859 | sapiconv - a tool for converting the encoding of files | 
| 752835 | Usage of the file interfaces in Unicode systems | 
| 539404 | |
| 27 | Recommendations for the ABAP file interface |