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I have the problem that Blender does not exit after executing in background mode from command line.

For example this command:

./blender -b -P test.py

gives me this output, but does not exit Blender:

Read prefs: /home/mbc/.config/blender/2.79/config/userpref.blend
found bundled python: /usr/local/blender/blender-2.79-linux-glibc219-x86_64/2.79/python
Hello world

My Python test script is very simple:

import bpy
print("Hello world")

Even if I don't run a Python script but just render a single frame, the Blender process does not exit.

I am running blender-2.79-linux-glibc219-x86_64 on Ubuntu 16.04.3 LTS with linux image version 4.4.0-112-lowlatency.

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3 Answers 3

Reset to default
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use bpy.ops.wm.quit_blender()?

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  • $\begingroup$ Thanks! I could not find that in the API documentation myself. However, as I wrote in my answer below, Blender does quit by itself when I work around the audio-related hang problem. $\endgroup$
    – Mikkel
    Jan 31, 2018 at 14:32
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Apparently there was something wrong with my audio setup in Linux. I run JACK via QJackCtl.

If I run Blender from the command line with the -noaudio switch, it exits on completion like it is supposed to.

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This is the case on my Windows10 as well. If I run the following script:

import bpy
bpy.ops.wm.quit_blender()

using the command:

blender --noaudio --python myscript.py

it will exit without prompting with the "Do you really want to quit?" prompt. If I omit the --noaudio option it always prompts. I might suggest that we consider adding an optional force parameter to quit_blender()

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  • $\begingroup$ If I add the -b option on the command line then it doesn't prompt. Of course, it also doesn't display the window. So prompting seems to be connected to both GUI and presence of audio. $\endgroup$
    – IRayTrace
    Jan 10, 2019 at 18:24

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