UTF8 issue while importing Data by R3 Connector

Hello
 
Source: ECC 6.0, R3 Connector, Datastor configured to ftp transport
Application Server: Windows Server 2012, codepage 437, english American, BODS 4.2 SP5
Target Database: Exasol 5.0.13, connected by exasol odbc
 
i'm using BODS(I) around 10 years but i simply can't get it work.
 
I can extract data from a lot of sources (oracle, exasol,mssql,mysql,flatfile), source/target DS configured to default Codepage, but when trying to import by a R3 dataflow i do not get special characters eg from turkey and chech ' řěŞİ'
 
- changing source to utf8 does not affect anything
- changing target to utf8 (the Columns are created as varchar utf8, and this works for all other sources) results in an column too short => when extending the column size i do not get any error but only hieroglyphs instead of ' řěŞİ'
 
Any Idea on how to deal with this?
 
Importing from another R3 system using Extractors instead of R3 Datafllows is btw fine.
 
Thank you,
Christian