ImportError: cannot import name '_core' from partially initialized module 'pychrono' (most likely due to a circular import)

[e-chesoni]

Issue

I recently installed Pychrono on Windows, following the instructions for option A) here. I was able to install everything as directed, but when I try to run the demo file demo_CH_coords.py from spyder and vscode I get the following error:

PS C:\Users\USERNAME\anaconda3\envs\chrono\Lib\site-packages\pychrono\demos> conda activate chrono
conda : The term 'conda' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if 
a path was included, verify that the path is correct and try again.
At line:1 char:1
+ conda activate chrono
+ 
    + CategoryInfo          : ObjectNotFound: (conda:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
 
PS C:\Users\USERNAME\anaconda3\envs\chrono\Lib\site-packages\pychrono\demos> & C:/Users/USERNAME/anaconda3/envs/chrono/python.exe c:/Users/TLab_PC_00/anaconda3/envs/chrono/Lib/site-packages/pychrono/demos/core/demo_CH_coords.py
First tutorial for PyChrono: vectors, matrices etc.
Traceback (most recent call last):
  File "c:\Users\USERNAME\anaconda3\envs\chrono\Lib\site-packages\pychrono\demos\core\demo_CH_coords.py", line 17, in <module>
    import pychrono as chrono
  File "C:\Users\USERNAME\anaconda3\envs\chrono\lib\site-packages\pychrono\__init__.py", line 54, in <module>
    from .core import *
  File "C:\Users\USERNAME\anaconda3\envs\chrono\lib\site-packages\pychrono\core.py", line 13, in <module>
    from . import _core
ImportError: cannot import name '_core' from partially initialized module 'pychrono' (most likely due to a circular import) (C:\Users\USERNAME\anaconda3\envs\chrono\lib\site-packages\pychrono\__init__.py)

I have read that this is a circular import issue online (and in the error obviously) but I have no idea where it is coming from, or how to fix it, seeing as this is all part of the installation process and I have not written any code yet myself.

What I've Tried

I did try creating a simple test file called test.py with only the import statement in it:
import pychrono as chrono
I get the same error when trying to run this file from the chrono venv in vscode.

Following the debug process in post #140 I tried installing Spyder in the chrono venv
conda install spyder
Opening it via the anaconda navigation terminal, and running demo_CH_coords.py. I get the same error

...
ImportError: cannot import name '_core' from partially initialized module 'pychrono' (most likely due to a circular import) (C:\Users\USERNAME\anaconda3\envs\chrono\lib\site-packages\pychrono\__init__.py)

I have also tried adding ...\anaconda3 and ...\anaconda3\Scripts paths to environment variables as suggested by RichiGit97 on post #423:

I get the same result running from spyder:

...
ImportError: cannot import name '_core' from partially initialized module 'pychrono' (most likely due to a circular import) (C:\Users\USERNAME\anaconda3\envs\chrono\lib\site-packages\pychrono\__init__.py)

Additional Information

For reference, I installed this version of pychrono: win-64_pychrono-8.0.0-py310_3631.tar.bz2 using this line from the instructions:
conda install win-64_pychrono-8.0.0-py310_3631.tar.bz2

And I have the following packages installed in the virtual environment chrono: (all installed during the installation process referenced above)

 Name                    Version                   Build  Channel
bzip2                     1.0.8            vc14h5832a3a_5  [vc14]  intel
ca-certificates           2023.7.22            h56e8100_0    conda-forge
cuda-cccl                 11.7.58                       0    nvidia/label/cuda-11.7.0
cuda-command-line-tools   11.7.0                        0    nvidia/label/cuda-11.7.0
cuda-compiler             11.7.0                        0    nvidia/label/cuda-11.7.0
cuda-cudart               11.7.60                       0    nvidia/label/cuda-11.7.0
cuda-cudart-dev           11.7.60                       0    nvidia/label/cuda-11.7.0
cuda-cuobjdump            11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-cupti                11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-cuxxfilt             11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-documentation        11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-libraries            11.7.0                        0    nvidia/label/cuda-11.7.0
cuda-libraries-dev        11.7.0                        0    nvidia/label/cuda-11.7.0
cuda-memcheck             11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-nsight-compute       11.7.0                        0    nvidia/label/cuda-11.7.0
cuda-nvcc                 11.7.64                       0    nvidia/label/cuda-11.7.0
cuda-nvdisasm             11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-nvml-dev             11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-nvprof               11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-nvprune              11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-nvrtc                11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-nvrtc-dev            11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-nvtx                 11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-nvvp                 11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-sanitizer-api        11.7.50                       0    nvidia/label/cuda-11.7.0
cuda-toolkit              11.7.0                        0    nvidia/label/cuda-11.7.0
cuda-tools                11.7.0                        0    nvidia/label/cuda-11.7.0
cuda-visual-tools         11.7.0                        0    nvidia/label/cuda-11.7.0
expat                     2.5.0                h63175ca_1    conda-forge
fontconfig                2.14.2               hbde0cde_0    conda-forge
freetype                  2.12.1               hdaf720e_2    conda-forge
glfw                      3.3.8                hcfcfb64_2    conda-forge
intel-openmp              2023.2.0         h57928b3_50497    conda-forge
intelpython               2023.2.0                      0    intel
irrlicht                  1.8.5                h65f4d7e_4    conda-forge
libblas                   3.9.0                     8_mkl    conda-forge
libcblas                  3.9.0                     8_mkl    conda-forge
libcublas                 11.10.1.25                    0    nvidia/label/cuda-11.7.0
libcublas-dev             11.10.1.25                    0    nvidia/label/cuda-11.7.0
libcufft                  10.7.2.50                     0    nvidia/label/cuda-11.7.0
libcufft-dev              10.7.2.50                     0    nvidia/label/cuda-11.7.0
libcurand                 10.2.10.50                    0    nvidia/label/cuda-11.7.0
libcurand-dev             10.2.10.50                    0    nvidia/label/cuda-11.7.0
libcusolver               11.3.5.50                     0    nvidia/label/cuda-11.7.0
libcusolver-dev           11.3.5.50                     0    nvidia/label/cuda-11.7.0
libcusparse               11.7.3.50                     0    nvidia/label/cuda-11.7.0
libcusparse-dev           11.7.3.50                     0    nvidia/label/cuda-11.7.0
libexpat                  2.5.0                h63175ca_1    conda-forge
libffi                    3.4.2                h8ffe710_5    intel
libiconv                  1.17                 h8ffe710_0    conda-forge
libjpeg-turbo             3.0.0                hcfcfb64_1    conda-forge
liblapack                 3.9.0                     8_mkl    conda-forge
libnpp                    11.7.3.21                     0    nvidia/label/cuda-11.7.0
libnpp-dev                11.7.3.21                     0    nvidia/label/cuda-11.7.0
libnvjpeg                 11.7.2.34                     0    nvidia/label/cuda-11.7.0
libnvjpeg-dev             11.7.2.34                     0    nvidia/label/cuda-11.7.0
libpng                    1.6.39               h19919ed_0    conda-forge
libsqlite                 3.42.0               hcfcfb64_0    intel
libzlib                   1.2.13               hcfcfb64_5    intel
mkl                       2020.4             hb70f87d_311    conda-forge
nsight-compute            2022.2.0.13                   0    nvidia/label/cuda-11.7.0
numpy                     1.24.0           py39hbccbffa_0    conda-forge
occt                      7.4.0                h823b557_3    conda-forge
openssl                   3.1.4                hcfcfb64_0    conda-forge
pip                       23.1.2             pyhd8ed1ab_0    intel
python                    3.9.16              h11da44f_23    intel
python_abi                3.9                      2_cp39    conda-forge
pythonocc-core            7.4.1            py39h3d1c7c5_0    conda-forge
sdl                       1.2.68               h21dd15a_0    conda-forge
sdl2                      2.28.4               h63175ca_0    conda-forge
setuptools                67.7.2             pyhd8ed1ab_0    intel
six                       1.16.0             pyh6c4a22f_0    conda-forge
tbb                       2020.3           vc14_intel_311  [vc14]  intel
tk                        8.6.12               h2bbff1b_0    intel
tzdata                    2023c                h71feb2d_0    intel
ucrt                      10.0.22621.0         h57928b3_0    intel
vc                        14.3                hb25d44b_16    intel
vc14_runtime              14.34.31931         h5081d32_16    intel
vs2015_runtime            14.34.31931         hed1258a_16    intel
wheel                     0.40.0             pyhd8ed1ab_0    intel
xz                        5.2.8                h8cc25b3_0    intel`

Plea

Please let me know if I can offer any more information to help get this issue resolved. Would really love to get Pychrono working :)