[ERROR] [Utils::readBasicIniFile()] + ModuleNotFoundError: No module named 'SofaRuntime.SofaRuntime'

[julien-siguenza]

Hi there!

Just installed SOFA Framework on my Windows11 machine following the instructions for conda installation, and using Pixi.

When running the runSofa -l SofaImGui -g imgui command to test that the installation is effective, I'm getting the following error:

[ERROR] [Utils::readBasicIniFile()] Error while trying to read file (C:/Users/julie/GitRepo/sim-labs/.pixi/envs/cantilever-shear/Library)

Still the GUI opens properly and I can run the simulation, despite the logo seems to be reversed in the taskbar:

---

Now, when running SOFA with the SofaPython3 plugin, using the runSofa -l SofaImGui -g imgui -l SofaPython3 command, I'm getting this additional error:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\julie\SOFA\v25.06.00\plugins\SofaPython3\lib\python3\site-packages\SofaRuntime\__init__.py", line 10, in <module>
    from SofaRuntime.SofaRuntime import *
ModuleNotFoundError: No module named 'SofaRuntime.SofaRuntime'
---------------------------------------
Checking SOFA_ROOT and SOFAPYTHON3_ROOT
Using environment variable SOFA_ROOT: C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear\Library
Using environment variable SOFAPYTHON3_ROOT: C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear\Library
Found Sofa.Helper.dll in C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear\Library\bin
Found SofaPython3.dll in C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear\Library\bin
---------------------------------------
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\julie\SOFA\v25.06.00\plugins\SofaPython3\lib\python3\site-packages\Sofa\__init__.py", line 153, in <module>
    import Sofa.Simulation
ModuleNotFoundError: No module named 'Sofa.Simulation'

---

Any insights would be greatly appreciated :)

[julien-siguenza]

I'm going to follow this thread which looks very similar to my issue (concerning the first error).

[olivier-roussel]

Hi @julien-siguenza,
Your log here
File "C:\Users\julie\SOFA\v25.06.00\plugins\SofaPython3\lib\python3\site-packages\Sofa\__init__.py", line 153, in <module> import Sofa.Simulation
suggests that you are mixing conda and other SOFA installation (such as the one in C:\Users\julie\SOFA\v25.06.00, which may have been looked up by one of your existing env variable).
You are saying that you have followed the instructions for the conda installation and using Pixi. Could you detail more how you installed the packages ? (actually you should not have followed the instructions if you are using Pixi)
I guess you are running your runSofa after having activated your cantilever-shear pixi environment right ?
Could you also provide your

• pixi.toml file ?
• output of conda info command when you are in your cantilever-shear pixi env (pixi shell -e cantilever-shear to activate it)
• output of conda list command when you are in your cantilever-shear pixi env
• output of your PATH and PYTHONPATH environment variables when you are in your cantilever-shear pixi env

[olivier-roussel]

Concerning your other issue
[ERROR] [Utils::readBasicIniFile()] Error while trying to read file (C:/Users/julie/GitRepo/sim-labs/.pixi/envs/cantilever-shear/Library),
Basically it just misses to load some default parameters but it should not be critical. I was also working on fixing this.

[julien-siguenza]

Thanks for you help @olivier-roussel !

Indeed, I have not strictly followed the instructions since I'm using Pixi ^_^'
But this should work on Pixi, right?

I have cleaned all the previous SOFA installations on my machine, and proceeded again to a fresh installation from the conda package (still using Pixi).

It seems that the error related to the python import (second error) has disappeared.

But I'm still facing the first error:

[ERROR] [Utils::readBasicIniFile()] Error while trying to read file (C:/Users/julie/GitRepo/sim-labs/.pixi/envs/cantilever-shear/Library)

1. I can confirm that I have the files (instructions from the other thread):
   • C:/Users/julie/GitRepo/sim-labs/.pixi/envs/cantilever-shear/etc/conda/activate.d/libsofa_activate.bat
   • C:/Users/julie/GitRepo/sim-labs/.pixi/envs/cantilever-shear/etc/conda/activate.d/sofa-python3_activate.bat
2. The content of my pixi.toml file:

[workspace]
channels = ["conda-forge", "https://prefix.dev/sofa-framework"]
platforms = ["linux-64", "win-64", "osx-64", "osx-arm64"]

[dependencies]
python = ">=3.9,<3.15"
attrs = ">=22.1.0,<26"
pandas = ">=2.1.1,<4"
ruff = ">=0.12.7,<0.16"

[pypi-dependencies]
sim-labs = { path = ".", editable = true }

[tasks]
ruff-check = "ruff check"
ruff-fix = "ruff check --fix"

[feature.DEMO_APP.dependencies]
matplotlib = ">=3.9.4,<4"
pygame = ">=2.6.1,<3"
pymunk = ">=7.0.1,<8"
xlsxwriter = ">=3.2.3,<4"
openpyxl = ">=3.1.5,<4"

[feature.DEMO_APP.tasks]
DEMO_APP = "python ./src/nuremics_labs/apps/general/DEMO_APP/system.py"

[feature.CANTILEVER_SHEAR_APP.dependencies]
pythonocc-core = ">=7.4.0,<8"
sofa-app = "=25.6.0"
sofa-python3 = "=25.6.0"

[feature.CANTILEVER_SHEAR_APP.pypi-dependencies]
gmsh = ">=4.15.0,<5"
meshio = ">=5.3.5,<6"
numpy = ">=2.4.2,<3"
pyvista = ">=0.47.1,<0.48"

[feature.CANTILEVER_SHEAR_APP.tasks]
CANTILEVER_SHEAR_APP = "python ./src/nuremics_labs/apps/simulation/CANTILEVER_SHEAR_APP/system.py"
GeometryProc = "python ./src/nuremics_labs/apps/simulation/CANTILEVER_SHEAR_APP/procs/GeometryProc/item.py"
LabelingProc = "python ./src/nuremics_labs/apps/simulation/CANTILEVER_SHEAR_APP/procs/LabelingProc/item.py"
MeshProc = "python ./src/nuremics_labs/apps/simulation/CANTILEVER_SHEAR_APP/procs/MeshProc/item.py"
ModelProc = "python ./src/nuremics_labs/apps/simulation/CANTILEVER_SHEAR_APP/procs/ModelProc/item.py"
SOFA = "runSofa -l SofaImGui -g imgui -l SofaPython3"

[environments]
demo = ["DEMO_APP"]
cantilever-shear = ["CANTILEVER_SHEAR_APP"]

3. Output of the command pixi info:

        Environment: cantilever-shear
           Features: CANTILEVER_SHEAR_APP, default
           Channels: conda-forge, https://prefix.dev/sofa-framework
   Dependency count: 7
       Dependencies: pythonocc-core, sofa-app, sofa-python3, python, attrs, pandas, ruff
  PyPI Dependencies: gmsh, meshio, numpy, pyvista, sim-labs
   Target platforms: win-64, linux-64, osx-arm64, osx-64
    Prefix location: C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear
              Tasks: ruff-fix, ruff-check, LabelingProc, SOFA, CANTILEVER_SHEAR_APP, GeometryProc, ModelProc, MeshProc

4. Output of the command pixi list -e cantilever-shear:

Environment: cantilever-shear                                                                                                                                   
Name                       Version                Build                         Size  Kind   Source                                                             
_openmp_mutex              4.5                    20_gnu                   51.03 KiB  conda  https://conda.anaconda.org/conda-forge                             
aiohappyeyeballs           2.6.1                  pyhd8ed1ab_0             19.29 KiB  conda  https://conda.anaconda.org/conda-forge                             
aiohttp                    3.13.3                 py313h51e1470_0         949.19 KiB  conda  https://conda.anaconda.org/conda-forge                             
aiosignal                  1.4.0                  pyhd8ed1ab_0             13.37 KiB  conda  https://conda.anaconda.org/conda-forge                             
aom                        3.9.1                  he0c23c2_0                1.87 MiB  conda  https://conda.anaconda.org/conda-forge                             
attrs                      25.4.0                 pyhcf101f3_1             63.24 KiB  conda  https://conda.anaconda.org/conda-forge                             
blosc                      1.21.6                 hfd34d9b_1               48.67 KiB  conda  https://conda.anaconda.org/conda-forge                             
brotli                     1.2.0                  h2d644bc_1               19.87 KiB  conda  https://conda.anaconda.org/conda-forge                             
brotli-bin                 1.2.0                  hfd05255_1               22.18 KiB  conda  https://conda.anaconda.org/conda-forge                             
bzip2                      1.0.8                  h0ad9c76_9               54.80 KiB  conda  https://conda.anaconda.org/conda-forge                             
ca-certificates            2026.2.25              h4c7d964_0              144.27 KiB  conda  https://conda.anaconda.org/conda-forge                             
cairo                      1.18.4                 h477c42c_1                1.47 MiB  conda  https://conda.anaconda.org/conda-forge                             
certifi                    2026.2.25                                      273.94 KiB  pypi   certifi-2026.2.25-py3-none-any.whl                                 
charset_normalizer         3.4.6                                          440.39 KiB  pypi   charset_normalizer-3.4.6-cp313-cp313-win_amd64.whl
cli11                      2.6.2                  h5112557_0               94.51 KiB  conda  https://conda.anaconda.org/conda-forge
contourpy                  1.3.3                  py313h1a38498_4         239.54 KiB  conda  https://conda.anaconda.org/conda-forge
cxxopts                    3.2.1                  hc790b64_1               21.78 KiB  conda  https://conda.anaconda.org/conda-forge
cycler                     0.12.1                 pyhcf101f3_2             14.43 KiB  conda  https://conda.anaconda.org/conda-forge
cyclopts                   4.10.0                                         739.67 KiB  pypi   cyclopts-4.10.0-py3-none-any.whl
dav1d                      1.2.1                  hcfcfb64_0              604.14 KiB  conda  https://conda.anaconda.org/conda-forge
docstring_parser           0.17.0                                         171.60 KiB  pypi   docstring_parser-0.17.0-py3-none-any.whl
docutils                   0.22.4                                           2.10 MiB  pypi   docutils-0.22.4-py3-none-any.whl
double-conversion          3.4.0                  hac47afa_0               69.28 KiB  conda  https://conda.anaconda.org/conda-forge
eigen                      5.0.1                  h5112557_0                1.25 MiB  conda  https://conda.anaconda.org/conda-forge
eigen-abi                  3.4.0.100              hc11354d_1               12.52 KiB  conda  https://conda.anaconda.org/conda-forge
expat                      2.7.4                  hac47afa_0              127.11 KiB  conda  https://conda.anaconda.org/conda-forge
ffmpeg                     8.0.1                  gpl_hb2d76f6_914          9.94 MiB  conda  https://conda.anaconda.org/conda-forge
fmt                        12.1.0                 h7f4e812_0              182.02 KiB  conda  https://conda.anaconda.org/conda-forge
font-ttf-dejavu-sans-mono  2.37                   hab24e00_0              388.06 KiB  conda  https://conda.anaconda.org/conda-forge
font-ttf-inconsolata       3.000                  h77eed37_0               94.27 KiB  conda  https://conda.anaconda.org/conda-forge
font-ttf-source-code-pro   2.038                  h77eed37_0              684.39 KiB  conda  https://conda.anaconda.org/conda-forge
font-ttf-ubuntu            0.83                   h77eed37_3                1.55 MiB  conda  https://conda.anaconda.org/conda-forge
fontconfig                 2.17.1                 hd47e2ca_0              190.75 KiB  conda  https://conda.anaconda.org/conda-forge
fonts-conda-ecosystem      1                      0                         3.58 KiB  conda  https://conda.anaconda.org/conda-forge
fonts-conda-forge          1                      hc364b38_1                3.96 KiB  conda  https://conda.anaconda.org/conda-forge
fonttools                  4.62.0                 py313hd650c13_0           2.43 MiB  conda  https://conda.anaconda.org/conda-forge
freeglut                   3.2.2                  he0c23c2_3              109.33 KiB  conda  https://conda.anaconda.org/conda-forge
freeimage                  3.18.0                 hf4481c9_24             458.37 KiB  conda  https://conda.anaconda.org/conda-forge
freetype                   2.14.2                 h57928b3_0              181.28 KiB  conda  https://conda.anaconda.org/conda-forge
fribidi                    1.0.16                 hfd05255_0               62.88 KiB  conda  https://conda.anaconda.org/conda-forge
frozenlist                 1.7.0                  py313h0c48a3b_0          47.98 KiB  conda  https://conda.anaconda.org/conda-forge
gdk-pixbuf                 2.44.5                 h1f5b9c4_1              561.47 KiB  conda  https://conda.anaconda.org/conda-forge
gl2ps                      1.4.2                  had7236b_1               70.26 KiB  conda  https://conda.anaconda.org/conda-forge
glew                       2.3.0                  hdfd1c44_0              531.28 KiB  conda  https://conda.anaconda.org/conda-forge
glfw                       3.4                    hfd05255_1              116.55 KiB  conda  https://conda.anaconda.org/conda-forge
glslang                    16.2.0                 h294ba9c_1                4.70 MiB  conda  https://conda.anaconda.org/conda-forge
gmsh                       4.15.1                                         139.70 MiB  pypi   gmsh-4.15.1-py2.py3-none-win_amd64.whl
graphite2                  1.3.14                 hac47afa_2               94.08 KiB  conda  https://conda.anaconda.org/conda-forge
gtest                      1.17.0                 hc790b64_1              485.58 KiB  conda  https://conda.anaconda.org/conda-forge
harfbuzz                   13.1.1                 h5a1b470_0                1.23 MiB  conda  https://conda.anaconda.org/conda-forge
hdf4                       4.2.15                 h5557f11_7              761.36 KiB  conda  https://conda.anaconda.org/conda-forge
hdf5                       1.14.6                 nompi_hae35d4c_106        2.24 MiB  conda  https://conda.anaconda.org/conda-forge
icu                        78.3                   h637d24d_0               14.26 MiB  conda  https://conda.anaconda.org/conda-forge
idna                       3.11                   pyhd8ed1ab_0             49.53 KiB  conda  https://conda.anaconda.org/conda-forge
imath                      3.2.2                  h1608b31_0              158.30 KiB  conda  https://conda.anaconda.org/conda-forge
jasper                     4.2.9                  h8ad263b_1              436.56 KiB  conda  https://conda.anaconda.org/conda-forge
jsoncpp                    1.9.6                  hda1637e_1              334.11 KiB  conda  https://conda.anaconda.org/conda-forge
jxrlib                     1.1                    hcfcfb64_3              347.01 KiB  conda  https://conda.anaconda.org/conda-forge
kiwisolver                 1.5.0                  py313h1a38498_0          71.82 KiB  conda  https://conda.anaconda.org/conda-forge
krb5                       1.22.2                 h0ea6238_0              733.45 KiB  conda  https://conda.anaconda.org/conda-forge
lame                       3.100                  hcfcfb64_1003           557.21 KiB  conda  https://conda.anaconda.org/conda-forge
lcms2                      2.18                   hf2c6c5f_0              510.00 KiB  conda  https://conda.anaconda.org/conda-forge
lerc                       4.1.0                  hd936e49_0              168.35 KiB  conda  https://conda.anaconda.org/conda-forge
libaec                     1.1.5                  haf901d7_0               33.66 KiB  conda  https://conda.anaconda.org/conda-forge
libblas                    3.11.0                 5_hf2e6a31_mkl           65.86 KiB  conda  https://conda.anaconda.org/conda-forge
libboost                   1.88.0                 h9dfe17d_7                2.29 MiB  conda  https://conda.anaconda.org/conda-forge
libboost-devel             1.88.0                 h1c1089f_7               41.56 KiB  conda  https://conda.anaconda.org/conda-forge
libboost-headers           1.88.0                 h57928b3_7               14.02 MiB  conda  https://conda.anaconda.org/conda-forge
libbrotlicommon            1.2.0                  hfd05255_1               80.12 KiB  conda  https://conda.anaconda.org/conda-forge
libbrotlidec               1.2.0                  hfd05255_1               33.64 KiB  conda  https://conda.anaconda.org/conda-forge
libbrotlienc               1.2.0                  hfd05255_1              246.98 KiB  conda  https://conda.anaconda.org/conda-forge
libcblas                   3.11.0                 5_h2a3cdd5_mkl           66.48 KiB  conda  https://conda.anaconda.org/conda-forge
libclang13                 22.1.0                 default_ha2db4b5_0       29.17 MiB  conda  https://conda.anaconda.org/conda-forge
libcurl                    8.19.0                 h8206538_0              383.34 KiB  conda  https://conda.anaconda.org/conda-forge
libdeflate                 1.25                   h51727cc_0              153.14 KiB  conda  https://conda.anaconda.org/conda-forge
libexpat                   2.7.4                  hac47afa_0               68.67 KiB  conda  https://conda.anaconda.org/conda-forge
libffi                     3.5.2                  h3d046cb_0               44.76 KiB  conda  https://conda.anaconda.org/conda-forge
libfreetype                2.14.2                 h57928b3_0                8.21 KiB  conda  https://conda.anaconda.org/conda-forge
libfreetype6               2.14.2                 hdbac1cb_0              332.18 KiB  conda  https://conda.anaconda.org/conda-forge
libgcc                     15.2.0                 h8ee18e1_18             800.80 KiB  conda  https://conda.anaconda.org/conda-forge
libglib                    2.86.4                 h0c9aed9_1                3.91 MiB  conda  https://conda.anaconda.org/conda-forge
libgomp                    15.2.0                 h8ee18e1_18             648.30 KiB  conda  https://conda.anaconda.org/conda-forge
libhwloc                   2.12.2                 default_h4379cf1_1000     2.30 MiB  conda  https://conda.anaconda.org/conda-forge
libhwy                     1.3.0                  ha71e874_1              523.62 KiB  conda  https://conda.anaconda.org/conda-forge
libiconv                   1.18                   hc1393d2_2              680.59 KiB  conda  https://conda.anaconda.org/conda-forge
libintl                    0.22.5                 h5728263_3               93.33 KiB  conda  https://conda.anaconda.org/conda-forge
libjpeg-turbo              3.1.2                  hfd05255_0              822.05 KiB  conda  https://conda.anaconda.org/conda-forge
libjxl                     0.11.2                 hf3f85d1_0                1.26 MiB  conda  https://conda.anaconda.org/conda-forge
liblapack                  3.11.0                 5_hf9ab0e9_mkl           78.34 KiB  conda  https://conda.anaconda.org/conda-forge
liblzma                    5.8.2                  hfd05255_0              103.68 KiB  conda  https://conda.anaconda.org/conda-forge
liblzma-devel              5.8.2                  hfd05255_0              127.23 KiB  conda  https://conda.anaconda.org/conda-forge
libmpdec                   4.0.0                  hfd05255_1               87.32 KiB  conda  https://conda.anaconda.org/conda-forge
libnetcdf                  4.10.0                 nompi_h3948bcf_100      647.04 KiB  conda  https://conda.anaconda.org/conda-forge
libogg                     1.3.5                  h2466b09_1               34.22 KiB  conda  https://conda.anaconda.org/conda-forge
libopus                    1.6.1                  h6a83c73_0              300.17 KiB  conda  https://conda.anaconda.org/conda-forge
libpng                     1.6.55                 h7351971_0              374.17 KiB  conda  https://conda.anaconda.org/conda-forge
libraw                     0.21.5                 h345c428_0              545.18 KiB  conda  https://conda.anaconda.org/conda-forge
librsvg                    2.62.1                 h15cfe45_0                3.20 MiB  conda  https://conda.anaconda.org/conda-forge
libsofa                    25.06.00               hf5e9d3c_4               11.06 MiB  conda  https://conda.anaconda.org/conda-forge
libsqlite                  3.52.0                 hf5d6505_0                1.24 MiB  conda  https://conda.anaconda.org/conda-forge
libssh2                    1.11.1                 h9aa295b_0              285.92 KiB  conda  https://conda.anaconda.org/conda-forge
libtheora                  1.1.1                  hc70643c_1006           156.68 KiB  conda  https://conda.anaconda.org/conda-forge
libtiff                    4.7.1                  h8f73337_1              969.89 KiB  conda  https://conda.anaconda.org/conda-forge
libusb                     1.0.29                 h1839187_0              115.43 KiB  conda  https://conda.anaconda.org/conda-forge
libvorbis                  1.3.7                  h5112557_2              237.70 KiB  conda  https://conda.anaconda.org/conda-forge
libvulkan-loader           1.4.341.0              h477610d_0              275.64 KiB  conda  https://conda.anaconda.org/conda-forge
libwebp-base               1.6.0                  h4d5522a_0              272.63 KiB  conda  https://conda.anaconda.org/conda-forge
libwinpthread              12.0.0.r4.gg4f2fc60ca  h57928b3_10              35.76 KiB  conda  https://conda.anaconda.org/conda-forge
libxcb                     1.17.0                 h0e4246c_0                1.15 MiB  conda  https://conda.anaconda.org/conda-forge
libxml2                    2.15.2                 h779ef1b_0               42.84 KiB  conda  https://conda.anaconda.org/conda-forge
libxml2-16                 2.15.2                 h3cfd58e_0              508.53 KiB  conda  https://conda.anaconda.org/conda-forge
libzip                     1.11.2                 h3135430_0              143.41 KiB  conda  https://conda.anaconda.org/conda-forge
libzlib                    1.3.1                  h2466b09_2               54.18 KiB  conda  https://conda.anaconda.org/conda-forge
llvm-openmp                22.1.0                 h4fa8253_0              339.26 KiB  conda  https://conda.anaconda.org/conda-forge
lz4-c                      1.10.0                 h2466b09_1              136.61 KiB  conda  https://conda.anaconda.org/conda-forge
markdown_it_py             4.0.0                                          224.67 KiB  pypi   markdown_it_py-4.0.0-py3-none-any.whl
matplotlib-base            3.10.8                 py313he1ded55_0           7.64 MiB  conda  https://conda.anaconda.org/conda-forge
mdurl                      0.1.2                                           22.76 KiB  pypi   mdurl-0.1.2-py3-none-any.whl
mesalib                    25.3.5                 h0663b03_0               40.29 MiB  conda  https://conda.anaconda.org/conda-forge
meshio                     5.3.5                                          527.78 KiB  pypi   meshio-5.3.5-py3-none-any.whl
mkl                        2025.3.0               hac47afa_455             95.58 MiB  conda  https://conda.anaconda.org/conda-forge
msgpack-python             1.1.2                  py313hf069bd2_1          86.15 KiB  conda  https://conda.anaconda.org/conda-forge
multidict                  6.7.1                  py313hd650c13_0          89.52 KiB  conda  https://conda.anaconda.org/conda-forge
munkres                    1.1.4                  pyhd8ed1ab_1             15.48 KiB  conda  https://conda.anaconda.org/conda-forge
nativefiledialog-extended  1.3.0                  ha22e26b_0               27.90 KiB  conda  https://conda.anaconda.org/conda-forge
nlohmann_json              3.12.0                 h5112557_1              131.71 KiB  conda  https://conda.anaconda.org/conda-forge
numpy                      2.4.3                  py313ha8dc839_0           6.92 MiB  conda  https://conda.anaconda.org/conda-forge
nuremics                   1.0.0                                                      pypi   git+https://github.com/nuremics/nuremics.git#97072aad9d0727860a13b39a3acbb6159521b7d7
occt                       7.9.3                  all_heefe0a3_202         23.41 MiB  conda  https://conda.anaconda.org/conda-forge
openexr                    3.4.7                  h3840fac_0              925.82 KiB  conda  https://conda.anaconda.org/conda-forge
openh264                   2.6.0                  hb17fa0b_0              401.63 KiB  conda  https://conda.anaconda.org/conda-forge
openjpeg                   2.5.4                  h0e57b4f_0              239.84 KiB  conda  https://conda.anaconda.org/conda-forge
openjph                    0.26.3                 hf13a347_0              210.61 KiB  conda  https://conda.anaconda.org/conda-forge
openssl                    3.6.1                  hf411b9b_1                8.91 MiB  conda  https://conda.anaconda.org/conda-forge
packaging                  26.0                   pyhcf101f3_0             70.32 KiB  conda  https://conda.anaconda.org/conda-forge
pandas                     3.0.1                  py313h26f5e95_0          13.13 MiB  conda  https://conda.anaconda.org/conda-forge
pango                      1.56.4                 h03d888a_0              444.19 KiB  conda  https://conda.anaconda.org/conda-forge
pcre2                      10.47                  hd2b5f0e_0              972.65 KiB  conda  https://conda.anaconda.org/conda-forge
pillow                     12.1.1                 py313h38f99e1_0         924.73 KiB  conda  https://conda.anaconda.org/conda-forge
pixman                     0.46.4                 h5112557_1              530.07 KiB  conda  https://conda.anaconda.org/conda-forge
platformdirs               4.9.4                                          101.98 KiB  pypi   platformdirs-4.9.4-py3-none-any.whl
pooch                      1.9.0                                          313.95 KiB  pypi   pooch-1.9.0-py3-none-any.whl
proj                       9.8.0                  hd30e2cd_0                3.00 MiB  conda  https://conda.anaconda.org/conda-forge
propcache                  0.3.1                  py313hb4c8b1a_0          49.13 KiB  conda  https://conda.anaconda.org/conda-forge
pthread-stubs              0.4                    h0e40799_1002             9.17 KiB  conda  https://conda.anaconda.org/conda-forge
pugixml                    1.15                   h372dad0_0              111.30 KiB  conda  https://conda.anaconda.org/conda-forge
pybind11                   3.0.2                  pyh7a1b43c_0            239.75 KiB  conda  https://conda.anaconda.org/conda-forge
pybind11-global            3.0.2                  pyh5e4992e_0            234.46 KiB  conda  https://conda.anaconda.org/conda-forge
pygments                   2.19.2                                           4.29 MiB  pypi   pygments-2.19.2-py3-none-any.whl
pyparsing                  3.3.2                  pyhcf101f3_0            108.29 KiB  conda  https://conda.anaconda.org/conda-forge
python                     3.13.12                h09917c8_100_cp313       15.77 MiB  conda  https://conda.anaconda.org/conda-forge
python-dateutil            2.9.0.post0            pyhe01879c_2            227.84 KiB  conda  https://conda.anaconda.org/conda-forge
python-tzdata              2025.3                 pyhd8ed1ab_0            140.18 KiB  conda  https://conda.anaconda.org/conda-forge
python_abi                 3.13                   8_cp313                   6.84 KiB  conda  https://conda.anaconda.org/conda-forge
pythonocc-core             7.9.3                  all_h4fe2f94_201         39.05 MiB  conda  https://conda.anaconda.org/conda-forge
pyvista                    0.47.1                                           6.48 MiB  pypi   pyvista-0.47.1-py3-none-any.whl
qhull                      2020.2                 hc790b64_5                1.31 MiB  conda  https://conda.anaconda.org/conda-forge
qt6-main                   6.10.2                 h35725d6_5               82.12 MiB  conda  https://conda.anaconda.org/conda-forge
rapidjson                  1.1.0.post20240409     he0c23c2_2              149.88 KiB  conda  https://conda.anaconda.org/conda-forge
requests                   2.32.5                                         199.50 KiB  pypi   requests-2.32.5-py3-none-any.whl
rich                       14.3.3                                           1.19 MiB  pypi   rich-14.3.3-py3-none-any.whl
rich_rst                   1.3.2                                           44.47 KiB  pypi   rich_rst-1.3.2-py3-none-any.whl
ruff                       0.15.5                 h5739096_0                9.28 MiB  conda  https://conda.anaconda.org/conda-forge
scooby                     0.11.0                                          53.55 KiB  pypi   scooby-0.11.0-py3-none-any.whl
sdl2                       2.32.56                h5112557_0              558.69 KiB  conda  https://conda.anaconda.org/conda-forge
sdl3                       3.4.2                  h5112557_0                1.59 MiB  conda  https://conda.anaconda.org/conda-forge
shaderc                    2025.5                 h8fa7867_1                1.49 MiB  conda  https://conda.anaconda.org/conda-forge
sim_labs                   1.0.0                                                      pypi
six                        1.17.0                 pyhe01879c_1             18.02 KiB  conda  https://conda.anaconda.org/conda-forge
snappy                     1.2.2                  h7fa0ca8_1               65.84 KiB  conda  https://conda.anaconda.org/conda-forge
sofa-app                   25.06.00               ha1acdad_5               38.88 MiB  conda  https://prefix.dev/sofa-framework
sofa-devel                 25.06.00               hfb79adf_4                1.39 MiB  conda  https://conda.anaconda.org/conda-forge
sofa-gl                    25.06.00               h9e1e609_4              784.40 KiB  conda  https://conda.anaconda.org/conda-forge
sofa-glfw                  25.06.00               py313h293575e_10          1.26 MiB  conda  https://prefix.dev/sofa-framework
sofa-python3               25.06.00               np2py313h49c3080_5        1.28 MiB  conda  https://prefix.dev/sofa-framework
spirv-tools                2026.1                 h49e36cd_0               13.24 MiB  conda  https://conda.anaconda.org/conda-forge
sqlite                     3.52.0                 hdb435a2_0              414.98 KiB  conda  https://conda.anaconda.org/conda-forge
svgwrite                   1.4.3                  pyhd8ed1ab_1             54.11 KiB  conda  https://conda.anaconda.org/conda-forge
svt-av1                    4.0.1                  hac47afa_0                1.73 MiB  conda  https://conda.anaconda.org/conda-forge
tbb                        2022.3.0               h3155e25_2              152.22 KiB  conda  https://conda.anaconda.org/conda-forge
tbb-devel                  2022.3.0               h68e04fd_2                1.07 MiB  conda  https://conda.anaconda.org/conda-forge
termcolor                  3.3.0                                           18.08 KiB  pypi   termcolor-3.3.0-py3-none-any.whl
tinyxml2                   11.0.0                 he0c23c2_0               73.39 KiB  conda  https://conda.anaconda.org/conda-forge
tk                         8.6.13                 h6ed50ae_3                3.36 MiB  conda  https://conda.anaconda.org/conda-forge
typing_extensions          4.15.0                 pyhcf101f3_0             50.48 KiB  conda  https://conda.anaconda.org/conda-forge
tzdata                     2025c                  hc9c84f9_1              116.34 KiB  conda  https://conda.anaconda.org/conda-forge
ucrt                       10.0.26100.0           h57928b3_0              678.41 KiB  conda  https://conda.anaconda.org/conda-forge
urllib3                    2.6.3                                          423.30 KiB  pypi   urllib3-2.6.3-py3-none-any.whl
utfcpp                     4.09                   h57928b3_0               14.31 KiB  conda  https://conda.anaconda.org/conda-forge
vc                         14.3                   h41ae7f8_34              18.90 KiB  conda  https://conda.anaconda.org/conda-forge
vc14_runtime               14.44.35208            h818238b_34             667.22 KiB  conda  https://conda.anaconda.org/conda-forge
vcomp14                    14.44.35208            h818238b_34             112.53 KiB  conda  https://conda.anaconda.org/conda-forge
viskores                   1.1.0                  cpu_h4b717ef_            10.75 MiB  conda  https://conda.anaconda.org/conda-forge
vs2015_runtime             14.44.35208            h38c0c73_34              18.89 KiB  conda  https://conda.anaconda.org/conda-forge
vtk                        9.6.0                  py313hf995cd9_3          27.26 KiB  conda  https://conda.anaconda.org/conda-forge
vtk-base                   9.6.0                  py313hf155e2f_3          53.90 MiB  conda  https://conda.anaconda.org/conda-forge
wslink                     2.5.6                  pyhd8ed1ab_0             35.87 KiB  conda  https://conda.anaconda.org/conda-forge
x264                       1!164.3095             h8ffe710_2             1017.47 KiB  conda  https://conda.anaconda.org/conda-forge
x265                       3.5                    h2d74725_3                5.26 MiB  conda  https://conda.anaconda.org/conda-forge
xorg-libxau                1.0.12                 hba3369d_1              106.69 KiB  conda  https://conda.anaconda.org/conda-forge
xorg-libxdmcp              1.1.5                  hba3369d_1               69.03 KiB  conda  https://conda.anaconda.org/conda-forge
yarl                       1.23.0                 py313hd650c13_0         141.83 KiB  conda  https://conda.anaconda.org/conda-forge
zfp                        1.0.1                  h2f0f97f_5              233.25 KiB  conda  https://conda.anaconda.org/conda-forge
zlib                       1.3.1                  h2466b09_2              104.92 KiB  conda  https://conda.anaconda.org/conda-forge
zlib-ng                    2.3.3                  h0261ad2_1              121.62 KiB  conda  https://conda.anaconda.org/conda-forge
zstd                       1.5.7                  h534d264_6              379.35 KiB  conda  https://conda.anaconda.org/conda-forge

5. Output of PATH from the cantilever-shear env:

C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear;C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear\Library/mingw-w64/bin;C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear\Library/usr/bin;C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear\Library/bin;C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear\Scripts;C:\Users\julie\GitRepo\sim-labs\.pixi\envs\cantilever-shear\bin;C:\Users\julie\micromamba\condabin;C:\Python311\Scripts\;C:\Python311\;C:\Program Files\Microsoft MPI\Bin\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files\Git\cmd;C:\Strawberry\c\bin;C:\Strawberry\perl\site\bin;C:\Strawberry\perl\bin;C:\Program Files\NVIDIA Corporation\Nsight Compute 2024.1.0\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\ProgramData\chocolatey\bin;C:\Program Files\Git\bin;C:\Program Files\CMake\bin;C:\clcache;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Docker\Docker\resources\bin;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files\MATLAB\R2025a\bin;C:\Program Files\cursor\resources\app\bin;C:\Program Files\dotnet\;C:\Users\julie\AppData\Local\Programs\Cast3M\PCW_24\bin;C:\Users\julie\micromamba\condabin;C:\Python311\Scripts\;C:\Python311\;C:\Program Files\Microsoft MPI\Bin\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files\Git\cmd;C:\Strawberry\c\bin;C:\Strawberry\perl\site\bin;C:\Strawberry\perl\bin;C:\Program Files\Docker\Docker\resources\bin;C:\Program Files\NVIDIA Corporation\Nsight Compute 2024.1.0\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\ProgramData\chocolatey\bin;C:\Program Files\Git\bin;C:\Program Files\CMake\bin;C:\clcache;C:\Program Files\dotnet\;C:\Users\julie\AppData\Local\micromamba;C:\Users\julie\AppData\Local\Microsoft\WindowsApps;C:\Users\julie\AppData\Local\Programs\Microsoft VS Code\bin;C:\Program Files\ParaView 5.13.1\bin;C:\Users\julie\anaconda3\condabin;C:\Program Files\LS-DYNA Suite R14 Student\lsdyna;C:\Users\julie\Install\OpenRadioss\exec;C:\Users\julie\Install\OpenRadioss\extlib\hm_reader\win64;C:\Users\julie\Install\OpenRadioss\extlib\intelOneAPI_runtime\win64;C:\Users\julie\AppData\Local\Microsoft\WindowsApps;C:\Users\julie\micromamba\pkgs\vmtk-1.4.0-py36_vc14hc29f2d6_1\Library\bin;C:\Users\julie\AppData\Local\Programs\MiKTeX\miktex\bin\x64;C:\Users\julie\AppData\Local\pixi\bin\;C:\Users\julie\.pixi\bin;C:\Users\julie\AppData\Local\Programs\Ollama;

5. Output of PYTHONPATH from the cantilever-shear env:

C:\Users\julie\Install\OpenRadioss\openradioss_gui;C:\Users\julie\AppData\Local\Programs\FreeCAD 0.21\bin;C:\Users\julie\AppData\Local\Programs\FreeCAD 0.21\Mod;C:\Users\julie\AppData\Local\Programs\FreeCAD 0.21\lib;

(Doesn't seem to be related to my env).

[julien-siguenza]

But anyway, the second issue disappeared, so I guess my issue is fixed if the error [ERROR] [Utils::readBasicIniFile()] Error while trying to read file (C:/Users/julie/GitRepo/sim-labs/.pixi/envs/cantilever-shear/Library) is not critical.

But I can see on this other thread that Windows 11 users may face other issues when using the SofaPython3.

So I will also probably face this same issue :/

[olivier-roussel]

Great that removing other installations fixed it.
It can seems weird that even within a Pixi environment SofaPython3 manages to find other installations outside the Pixi env, but it actually has it own mechanics to look for the python packages that does not mix very well with conda (see https://github.com/sofa-framework/SofaPython3/blob/master/Plugin/src/SofaPython3/PythonEnvironment.cpp). Otherwise, it can comes also from some environment variables that have been set externally and still points to existing other installations.
For the other issue with readBasicIniFile, I think you don't have it anymore as the ini file is created after the first successful run also, you might have it only at first.
For issues in #27, I'm working on a fix, stay tuned.

[julien-siguenza]

I still have the readBasicIniFile issue @olivier-roussel.

Would you want me to make additionnal tests?

[olivier-roussel]

Ok I misunderstood. I'll have a look as well on it.