I intend to fix bug #1223937: subprocess.py abuse of errno. I thought this was going to to tricky, to maintain backwards compatibility, but then I realized that check_call() and CalledProcessError() are not available in any released version of Python, so I guess it's safe to change them. See http://www.python.org/sf?id=1223937 for my suggested patch. Any chance this can go into 2.5? Yeah, I know I'm late :) Regards, -- Peter Åstrand ThinLinc Chief Developer Cendio http://www.cendio.se Teknikringen 3 583 30 Linköping Phone: +46-13-21 46 00