popen() works fine in Python 1.5.2 on Windows NT 4.0, too. I think though that it doesn't work in Mark Hammond's PythonWin. Jesper Hertel Forlaget Magnus A/S Denmark jh at cddk.dk <bragib at my-deja.com> wrote in message news:8s1nn2$4co$1 at nnrp1.deja.com... > Note that popen is only for UNIX platforms.