[Zope] popen hangs on W2K

Hi! popen3() of the python (2.1.2) which comes with zope hangs on W2K: (stdin, stdout, stderr)=popen3('wvWare -x wvware.xml foo.doc') text=stdout.read() --> read never ends. It works if wvware produces few output, but with larger files it hangs (0% CPU usage). wvware is a binary from gnuwin32.sourceforge.net Platform: Windows 2000 SP2 Has someone seen this problem before? thomas