Hi Max,
I suspect the problem is one of character encoding. CODAP expects CSV files to have an encoding of UTF-8. This is a standard encoding and will work for many cases. It is likely that your CSV file was encoded with a different character encoding.
If you created the CSV file from some other data source then the tool you used to create the file may give you the ability to specify the encoding. If you only have the CSV file, there are tools available to convert the files, depending on your computer type. On Macs, for example there is a command line tool called “iconv”.
Jonathan