Hi, 2010年11月23日 Glenn Linderman <v+python at g.nevcal.com>: > File "C:\Python32\lib\random.py", line 108, in seed > a = int.from_bytes(_urandom(32), 'big') > WindowsError: [Error -2146893818] Invalid Signature In the subprocess documentation http://docs.python.org/library/subprocess.html """On Windows, in order to run a side-by-side assembly the specified env *must* include a valid SystemRoot.""" Can you keep this variable and start again? -- Amaury Forgeot d'Arc