Upload text files with non-english characters

I use an Apex page to upload text files. Then i retrieve the contents of files from wwv_flow_files.blob_content and convert them to varchar2 with utl_raw.cast_to_varchar2, but characters like ò, à, ù become garbage.
What could be the problem? Are characters lost when files are stored in wwv_flow_files or when i do the conversion?
Some other info:
* I see wwv_flow_files.DAD_CHARSET is set to "ascii", wwv_flow_files.FILE_CHARSET is null.
* Trying utl_raw.cast_to_varchar2( utl_raw.cast_to_raw('àòèù') ) returns 'àòèù' correctly;
* NLS_CHARACTERSET parameter is AL32UTF8 (not just english ASCII)

Hi
Have a look at csv upload -- suggestion needed with non-English character in csv file it might help you.
Thanks,
Manish

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Hi
Have a look at csv upload -- suggestion needed with non-English character in csv file it might help you.
Thanks,
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