Hi! On Tue, Sep 8, 2009 at 10:25 AM, Mathieu Malaterre<mathieu.malaterre@gmail.com> wrote: > nawk: cannot open "/dev/tty" for output (No such device or address) Wild guess is that it's a problem with awk. Take a look at http://www.gnu.org/manual/gawk/html_node/Special-FD.html It seems to be caused by how awk is using the redirect to write to the file. Best regards, Nelson