This is a follow up to: "quote char is ignored when quote char=escape char - ID: 3030747"
It is now forbidden for CSVReader that the quote and escape character are the same. if the two are the same it throws:
"The separator, quote, and escape characters must be different!"
However http://tools.ietf.org/html/rfc4180 recommends that doublequotes within a doublequote enclosed field should be escaped by another doublequote.
In my case, I should process CSV files created by Excel. Excel does exactly this. It encloses fields in double quotes. It escapes doublequotes with a 2nd doublequote. So CSVReader can not properly process MS Excel CSV-Files.