how to use execfile with argument under windows

[baur79]

Hi everybody

i need to execute this command line (different source for n times)

filename.exe -type png -source sourcearg -file filename.png


i try with python (python script and filename.exe in same directory)

import os
......
......
execfile("filename.exe -type png -source sourcearg -file filename.png")

error output
IOError: [Errno 2] No such file or directory:"filename.exe -type png
-source sourcearg -file filename.png"

try
execfile("d:\pathto\filename.exe -type png -source sourcearg -file
filename.png")

error output
IOError: [Errno 2] No such file or directory:"d:\pathto\filename.exe
filename.exe -type png -source sourcearg -file filename.png"


please help to solve problem
thanks