Page MenuHome

error message update translation
Closed, ResolvedPublicBUG


System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 960/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.12

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: rB77d23b0bd76f
Worked: (optional)

Short description of error
In use I18n Update Traslation/Update Trunk an error message is displayed:

Traceback (most recent call last):

File "C:\Program Files\Blender Foundation\Blender 2.82\2.82\scripts\addons\ui_translate\", line 197, in execute
  utils_languages_menu.gen_menu_file(stats, self.settings)
File "C:\Program Files\Blender Foundation\Blender 2.82\2.82\scripts\modules\bl_i18n_utils\", line 97, in gen_menu_file
File "C:\Program Files\Blender Foundation\Blender 2.82\2.82\python\lib\encodings\", line 19, in encode
  return codecs.charmap_encode(input,self.errors,encoding_table)[0]

UnicodeEncodeError: 'charmap' codec can't encode characters in position 544-546: character maps to <undefined>

location: <unknown location>:-1

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

Event Timeline

This report does not have the steps to reproduce the problem, which is required for us to investigate the issue.

@Bastien Montagne (mont29), is that something you are familiar with?

Bastien Montagne (mont29) changed the task status from Needs Triage to Needs Developer to Reproduce.Mar 20 2020, 5:23 PM
Bastien Montagne (mont29) claimed this task.
Bastien Montagne (mont29) changed the subtype of this task from "Report" to "Bug".

The joys of windows and its non-UTF8 encodings… Am surprised though, @Ray molenkamp (LazyDodo) isn't our own "release python" supposed to enforce utf8 encoding as default? or is there no way to prevent it from using default OS encoding as default?

Can always explicitly force UTF8 encoding everywhere, but this is a bit painful and verbose…

Beats me, happy to look at this, but i'm unsure how to reproduce, the documentation i found does a great job on how to use the tools, but beyond 'All this makes references to the bf-translations svn repository.` it doesn't really help all that much on how to set it up.

So for me to look at this:

  1. Assume i'm a 7 year old
  2. Assume i'm not the brightest crayon in the box
  3. Tell me how to reproduce this

Quick test seems to agree with you though that UTF8 is default

PYTHON INTERACTIVE CONSOLE 3.7.4 (default, Feb 17 2020, 16:23:28) [MSC v.1916 64 bit (AMD64)]

Builtin Modules:       bpy,, bpy.ops, bpy.props, bpy.types, bpy.context, bpy.utils, bgl, blf, mathutils
Convenience Imports:   from mathutils import *; from math import *
Convenience Variables: C = bpy.context, D =

>>> import sys; print(sys.getdefaultencoding())


@Ray molenkamp (LazyDodo) Don’t think you need to use the whole add-on? Just try to write a text file from blender's python, using complex characters (like e.g. some random Chinese ones), on a windows with non-UTF8 default encoding?

Something like that, e.g.:

import os
with open(os.path.join(, "test.txt"), 'w') as f:
    f.write("yún 云/雲 – 'cloud'")
Bastien Montagne (mont29) changed the task status from Needs Developer to Reproduce to Needs Information from User.Mar 20 2020, 6:26 PM

@Jozef Matta (pegas923) would be nice if you could run those three lines in your Blender py console as well, actually. ;)

Out of the box doesn't work

>>> import os
>>> with open(os.path.join(, "test.txt"), 'w') as f:
...     f.write("yún 云/雲 – 'cloud'")
Traceback (most recent call last):
  File "<blender_console>", line 2, in <module>
  File "k:\BlenderGit\build_windows_Full_x64_vc16_Release\bin\Release\2.83\python\lib\encodings\", line 19, in encode
    return codecs.charmap_encode(input,self.errors,encoding_table)[0]
UnicodeEncodeError: 'charmap' codec can't encode character '\u4e91' in position 4: character maps to <undefined>

forcing it to utf8 does seem to do the trick though.

>>> import os
>>> with open(os.path.join(, "test.txt"), 'w', encoding="utf-8") as f:
...     f.write("yún 云/雲 – 'cloud'")


I'm not python expert (as you noticed) but this seems to imply that files by default use platform specific encoding unless you specify otherwise.

@Ray molenkamp (LazyDodo) oki thanks, then I have to put that explicit UTF8 encoding everywhere... Kind of assumed our own py in Blender was smart and enforced utf8 encoding by default. ;)

Looks like python is going to start warning in never versions when you not specify an encoding judging from PIP 597 , so it may not be a bad idea to be explicit everywhere (as annoying as it is)

For years we shipped a modified python on windows (mostly to deal with our old old compiler we used for releases, but i don't think we ever messed with the encoding stuff) but nowdays we are on a stock python,