Ken, thank you for your explanation. I was not aware that I was using the testing version. After downgrading perl (and, after that, biblatex), biber started working. Thanks once again! Leon. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple