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I am trying to start and run a blend file with python3 popen under windows 7, but all I am able to do is start Blender.

blendFile = "D:\_Blender_Files\atrium.blend"
blenderPath = r"C:\Program Files\Blender Foundation\blender-2.71-windows64\blender.exe"
subprocess.Popen([blenderPath, blendFile], stdout=subprocess.PIPE)
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    $\begingroup$ closing, the issue with slash direction is a common beginner mistake, and not specific to Blender. $\endgroup$
    – ideasman42
    Commented Jul 15, 2014 at 23:23

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It's because of the escape character "\" and how python handles it. Windows paths on python scripts are a nightmare. So you have to escape the backslash.

Try :

blendFile = "D:\\_Blender_Files\\atrium.blend"
blenderPath = r"C:\\Program Files\\Blender Foundation\\blender-2.71-windows64\\blender.exe"
subprocess.Popen([blenderPath, blendFile], stdout=subprocess.PIPE)

or with simple slashes (python handles it well) :

blendFile = "D:/_Blender_Files/atrium.blend"
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  • $\begingroup$ Dang, you hit the nail, thank You for the fast reply! $\endgroup$
    – Gilles
    Commented Jul 15, 2014 at 13:41

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