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I want to be able to get the contents of stdout and stderr when I run the following script on windows using pythonw.exe: import subprocess import sys import os import string import time tmpdir = 'c:/temp' cmd = 'dir c:' tmpfile = "tmp_%f" % (time.time()) tmpfile = os.path.normpath(os.path.join(tmpdir,tmpfile)) tmpfile2 = tmpfile+".bat" tmpfile3 = tmpfile+".txt" fa = open(tmpfile2,'w') fa.write("@ECHO OFF > NUL\n") fa.write('call '+cmd+"\n") fa.close() wcmd = [] wcmd.append(tmpfile2) startupinfo = subprocess.STARTUPINFO() startupinfo.dwFlags |= subprocess._subprocess.STARTF_USESHOWWINDOW fb = open(tmpfile3,'w') fb.write("\n") fb.write(tmpfile2+"\n") try: procval = subprocess.Popen(wcmd, startupinfo=startupinfo, stdout=subprocess.PIPE, stderr=subprocess.STDOUT).communicate() fb.write(str(procval)+"\n") fb.write("Sucess") fb.close() except: fb.write(str(procval)+"\n") fb.write("Failure") fb.close() When I execute it using python.exe I get the expected output. When I run it using pythonw.exe I end up on the exception side. If I run the popen with just the command and the startupinfo flags the command will successfully complete but no access to the data in the child processs. Everything that I read stated that this should work but must be missing something. Any help would be greatly appreciated. Thanks, Randy

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