Newly installed Blender won't open in windows 10 due to python error #98131

New Issue

Joshua Dempster · 2022-05-15T04:23:51+02:00

Joshua Dempster commented

2022-05-15 04:23:51 +02:00

System Information
Operating system: Windows 10
Graphics card: GTX 970

Blender Version
Broken: 3.1.2

Short description of error
I have my own copy of Python installed (3.7). I downloaded and installed the official package from blender.org. Blender opens a window then closes. Opening with Powershell gets the following traceback:

Internal error initializing Python!
Fatal Python error: init_import_site: Failed to import the site module
Python runtime state: initialized
Traceback (most recent call last):

File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\site-packages\site.py", line 73, in <module>
  __boot()
File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\site-packages\site.py", line 26, in __boot
  import imp  # Avoid import loop in Python >= 3.3
File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\imp.py", line 19, in <module>
  from importlib._bootstrap import _ERR_MSG, _exec, _load, _builtin_from_name
File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", line 51, in <module>
  _w_long = _bootstrap_external._w_long

AttributeError: module 'importlib._bootstrap_external' has no attribute '_w_long'

This installation of python is the only one in my path and pythonpath variables. I experimented with forcing it to load ._bootstrap_external fresh from source, rather than the frozen version. This got me past this exception, but led to a new traceback that makes me think the underlying issue is a conflict between Blender's and my system's pythons:

Internal error initializing Python!
Fatal Python error: init_import_site: Failed to import the site module
Python runtime state: initialized
Traceback (most recent call last):

File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\site-packages\site.py", line 73, in <module>
  __boot()
File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\site-packages\site.py", line 34, in __boot
  imp.load_module('site', stream, path, descr)
File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\imp.py", line 235, in load_module
  return load_source(name, filename, file)
File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\imp.py", line 170, in load_source
  module = _exec(spec, sys.modules[name])
File "<frozen importlib._bootstrap>", line 619, in _exec
File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\importlib\_bootstrap_external.py", line 728, in exec_module
  _bootstrap._call_with_frames_removed(exec, code, module.__dict__)
File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 617, in <module>
  main()
File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 604, in main
  known_paths = addsitepackages(known_paths)
File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 387, in addsitepackages
  addsitedir(sitedir, known_paths)
File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 226, in addsitedir
  addpackage(sitedir, name, known_paths)
File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 175, in addpackage
  f = io.TextIOWrapper(io.open_code(fullname), encoding="locale")

AttributeError: module 'io' has no attribute 'open_code'

Exact steps for others to reproduce the error
Download blender onto a windows machine with a local installation of Python 3.7.

**System Information** Operating system: Windows 10 Graphics card: GTX 970 **Blender Version** Broken: 3.1.2 **Short description of error** I have my own copy of Python installed (3.7). I downloaded and installed the official package from blender.org. Blender opens a window then closes. Opening with Powershell gets the following traceback: __________________________________________________________ Internal error initializing Python! Fatal Python error: init_import_site: Failed to import the site module Python runtime state: initialized Traceback (most recent call last): ``` File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\site-packages\site.py", line 73, in <module> __boot() File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\site-packages\site.py", line 26, in __boot import imp # Avoid import loop in Python >= 3.3 File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\imp.py", line 19, in <module> from importlib._bootstrap import _ERR_MSG, _exec, _load, _builtin_from_name File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", line 51, in <module> _w_long = _bootstrap_external._w_long ``` AttributeError: module 'importlib._bootstrap_external' has no attribute '_w_long' ______________________________________________________________________ This installation of python is the only one in my path and pythonpath variables. I experimented with forcing it to load ._bootstrap_external fresh from source, rather than the frozen version. This got me past this exception, but led to a new traceback that makes me think the underlying issue is a conflict between Blender's and my system's pythons: ______________________________________________________ Internal error initializing Python! Fatal Python error: init_import_site: Failed to import the site module Python runtime state: initialized Traceback (most recent call last): ``` File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\site-packages\site.py", line 73, in <module> __boot() File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\site-packages\site.py", line 34, in __boot imp.load_module('site', stream, path, descr) File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\imp.py", line 235, in load_module return load_source(name, filename, file) File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\imp.py", line 170, in load_source module = _exec(spec, sys.modules[name]) File "<frozen importlib._bootstrap>", line 619, in _exec File "C:\Users\Josh\AppData\Local\Programs\Python\Python37\lib\importlib\_bootstrap_external.py", line 728, in exec_module _bootstrap._call_with_frames_removed(exec, code, module.__dict__) File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 617, in <module> main() File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 604, in main known_paths = addsitepackages(known_paths) File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 387, in addsitepackages addsitedir(sitedir, known_paths) File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 226, in addsitedir addpackage(sitedir, name, known_paths) File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\python\lib\site.py", line 175, in addpackage f = io.TextIOWrapper(io.open_code(fullname), encoding="locale") ``` AttributeError: module 'io' has no attribute 'open_code' ________________________________________________________________________________ **Exact steps for others to reproduce the error** Download blender onto a windows machine with a local installation of Python 3.7.

Joshua Dempster commented

2022-05-15 04:23:51 +02:00

Added subscriber: @joshdempster

Germano Cavalcante commented

2022-05-18 00:31:43 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-05-18 00:31:43 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Germano Cavalcante commented

2022-05-18 00:31:43 +02:00

Thanks for the report.

Could you confirm where you downloaded the Blender installer from?

Blender installer from https://www.blender.org/download/ already comes with a bundled python 3.10 (3.7 is not supported)

If you are not using the python 3.10 package in blender, it is to be expected that it will not work.

Thanks for the report. Could you confirm where you downloaded the Blender installer from? Blender installer from https://www.blender.org/download/ already comes with a bundled python 3.10 (3.7 is not supported) If you are not using the python 3.10 package in blender, it is to be expected that it will not work.

Joshua Dempster commented

2022-05-18 02:45:31 +02:00

Yes, I downloaded it from blender.org/download. The problem is that Blender is using my system python, not the bundled python. Specifically, I suspect Blender is invoking the system python interpreter, then trying to use it to read in packages from the Blender bundled version, or vice versa.

Is it possible that Blender launches with a command like

  >>python <some_file.py>

instead of

  >>\absolute\path\blender\python <some_file.py>

? Just a guess.

Yes, I downloaded it from blender.org/download. The problem is that Blender is using my system python, not the bundled python. Specifically, I suspect Blender is invoking the system python interpreter, then trying to use it to read in packages from the Blender bundled version, or vice versa. Is it possible that Blender launches with a command like ``` >>python <some_file.py> ``` instead of ``` >>\absolute\path\blender\python <some_file.py> ``` ? Just a guess.

Ray molenkamp commented

2022-05-18 02:47:27 +02:00

Added subscriber: @LazyDodo

Ray molenkamp commented

2022-05-18 02:47:27 +02:00

when you start bender using the blender_factory_startup.cmd batch file located next to blender.exe is it happier?

when you start bender using the `blender_factory_startup.cmd` batch file located next to blender.exe is it happier?

Joshua Dempster commented

2022-05-18 02:56:30 +02:00

Yup, that launches successfully. I attached the system info.blender_system_info.txt

Yup, that launches successfully. I attached the system info.[blender_system_info.txt](https://archive.blender.org/developer/F13083059/blender_system_info.txt)

Ray molenkamp commented

2022-05-18 03:09:14 +02:00

Added subscriber: @ideasman42

Ray molenkamp commented

2022-05-18 03:09:14 +02:00

blender_factory_startup.cmd clears the PYTHONPATH env variable before starting blender that's likely why it's starting, afaik blender is setup by default to ignore it unless you pass a very specific switch telling it not to, so i'm not entirely sure what's going on here, @ideasman42 any bright ideas?

blender_factory_startup.cmd clears the `PYTHONPATH` env variable before starting blender that's likely why it's starting, afaik blender is setup by default to ignore it unless you pass a very specific switch telling it not to, so i'm not entirely sure what's going on here, @ideasman42 any bright ideas?

Campbell Barton commented

2022-05-18 03:47:53 +02:00

Using PYTHONPATH should be an exceptional case, if the PYTHONPATH is used anyway, PyPreConfig_InitIsolatedConfig may not be working as it should.

Committed a change that logs when PYTHONPATH expected to be used.

With ebb492a389 or newer (will be in the next daily build) please try run this from the terminal:

blender --log "bpy.interface.*" --log-level 2

As well as:

blender --log "bpy.interface.*" --log-level 2 --python-use-system-env

The first command should ignore the PYTHONPATH and succeed in starting Blender.

The second may fail if PYTHONPATH points to an unsupported Python version.

Both commands should show a message:

INFO (bpy.interface): source/blender/python/intern/bpy_interface.c:316 BPY_python_start: Initializing *without* support for the systems Python environment such as 'PYTHONPATH' and the user-site directory.

... where *with* / *without* depend on passing in the --python-use-system-env argument.

Please try an updated build and show the full output of both commands.

Using `PYTHONPATH` should be an exceptional case, if the PYTHONPATH is used anyway, `PyPreConfig_InitIsolatedConfig` may not be working as it should. Committed a change that logs when `PYTHONPATH` expected to be used. With ebb492a389 or newer (will be in the next daily build) please try run this from the terminal: `blender --log "bpy.interface.*" --log-level 2` As well as: `blender --log "bpy.interface.*" --log-level 2 --python-use-system-env` The first command should ignore the PYTHONPATH and succeed in starting Blender. The second may fail if PYTHONPATH points to an unsupported Python version. ---- Both commands should show a message: ``` INFO (bpy.interface): source/blender/python/intern/bpy_interface.c:316 BPY_python_start: Initializing *without* support for the systems Python environment such as 'PYTHONPATH' and the user-site directory. ``` ... where `*with*` / `*without*` depend on passing in the `--python-use-system-env` argument. ---- Please try an updated build and show the full output of both commands.

Pratik Borhade commented

2022-06-08 08:46:58 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-06-08 08:46:58 +02:00

Please try an updated build and show the full output of both commands.

@joshdempster ^

> Please try an updated build and show the full output of both commands. @joshdempster ^

Pratik Borhade commented

2022-08-05 04:08:06 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Pratik Borhade closed this issue

2022-08-05 04:08:06 +02:00

Pratik Borhade commented

2022-08-05 04:08:06 +02:00

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed. Thanks again for the report. If the problem persists please open a new report with the required information.

Germano Cavalcante referenced this issue

2023-12-01 14:45:26 +01:00

New Windows install, multiple Blender versions crash: EXCEPTION_ACCESS_VIOLATION (Python 3.12.0 conflict?) #115648

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Newly installed Blender won't open in windows 10 due to python error #98131