Hi Bocheng, I realized this "conda install bochengzou::pydeme -c bochengzou -c nvidia -c dlr-sc -c conda-forge" does not contain the pychrono package. Will I have to install it separately? And is there an order to the installation?
Best regards, Nnamdi On Fri, Aug 22, 2025 at 1:12 PM Nnamdi Chikere <nchik...@nd.edu> wrote: > Thank you very much. I will try it out and let you know if I have any > problems. > > Best regards, > Nnamdi > > On Thu, Aug 21, 2025 at 10:12 PM 'Bocheng Zou' via ProjectChrono < > projectchrono@googlegroups.com> wrote: > >> Hi Nnamdi, >> >> Sorry for the long delay. We have released the test version of PyDEME >> through conda . Please try installing the PyDEME through the following >> command in a NEW environment created using "conda create -n tutorial >> "python<3.13" -c conda-forge". >> >> conda install bochengzou::pydeme -c bochengzou -c nvidia -c dlr-sc -c >> conda-forge >> >> Let me know if you encounter any issues. >> >> Best, >> >> Bocheng Zou >> On 8/6/25 19:36, 'Nnamdi Chikere' via ProjectChrono wrote: >> >> Thank you so much. I am looking forward to the PyDEME conda package this >> week. >> >> Best regards, >> Nnamdi >> >> On Monday, August 4, 2025 at 4:44:53 PM UTC-4 bzo...@wisc.edu wrote: >> >>> Hi Nnamdi, >>> >>> Thank you for bringing that issue to our attention. The Py-DEME's >>> building pipeline is not stable on Windows at this moment. We suggest you >>> try to build from source or use WSL . >>> >>> We will likely to bring up a conda package for PyDEME for Windows to >>> make this process much easier this week. >>> >>> If you intend to reproduce the results that you asked Harry for in >>> another email chain, >>> https://groups.google.com/g/projectchrono/c/fWYnvZKkT4g >>> <https://urldefense.com/v3/__https://groups.google.com/g/projectchrono/c/fWYnvZKkT4g__;!!Mak6IKo!JX-cqt87BA-368G9A9yWM_Ikk5CTcdqeDKzA6x-EDqiwC_kk3Z3V4ydc43Fqt3sN2XEpyJ-gNXaWt38SiwDJKtV3F_NFxQ$> >>> , Py-DEME is not required and you can just follow the instruction in >>> Harry's github. >>> >>> I will keep you posted on Py-DEME's Windows conda package. >>> >>> Best, >>> >>> Bocheng Zou >>> On 8/4/25 19:20, 'Nnamdi Chikere' via ProjectChrono wrote: >>> >>> Thank you so much for your replies. >>> @Bocheng, I created an environment following the steps you outlined and >>> from the GitHub page to install the Py-DEME I followed these steps >>> >>> conda install cmake >>> pip3 install DEME >>> >>> I got these errors. >>> (chrono_test2) conda install cmake >>> >>> >>> Channels: >>> >>> - conda-forge >>> >>> - defaults >>> Platform: win-64 >>> Collecting package metadata (repodata.json): done >>> Solving environment: done >>> >>> cmake conda-forge/win-64::cmake-4.0.3-hff78f93_0 >>> libuv conda-forge/win-64::libuv-1.51.0-hfd05255_1 >>> >>> >>> Proceed ([y]/n)? y >>> Downloading and Extracting Packages: >>> Preparing transaction: done >>> >>> Verifying transaction: done >>> Executing transaction: done >>> >>> (chrono_test2) pip3 install DEME >>> Collecting DEME >>> Using cached deme-2.1.2.tar.gz (6.9 MB) >>> Installing build dependencies ... done >>> Getting requirements to build wheel ... error >>> error: subprocess-exited-with-error >>> >>> × Getting requirements to build wheel did not run successfully. >>> │ exit code: 1 >>> ╰─> [33 lines of output] >>> Traceback (most recent call last): >>> File >>> "C:\Users\chike\anaconda3\envs\chrono_test2\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", >>> line 389, in <module> >>> main() >>> File >>> "C:\Users\chike\anaconda3\envs\chrono_test2\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", >>> line 373, in main >>> json_out["return_val"] = hook(**hook_input["kwargs"]) >>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ >>> File >>> "C:\Users\chike\anaconda3\envs\chrono_test2\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", >>> line 137, in get_requires_for_build_wheel >>> backend = _build_backend() >>> ^^^^^^^^^^^^^^^^ >>> File >>> "C:\Users\chike\anaconda3\envs\chrono_test2\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", >>> line 70, in _build_backend >>> obj = import_module(mod_path) >>> ^^^^^^^^^^^^^^^^^^^^^^^ >>> File >>> "C:\Users\chike\anaconda3\envs\chrono_test2\Lib\importlib\__init__.py", >>> line 90, in import_module >>> return _bootstrap._gcd_import(name[level:], package, level) >>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ >>> File "<frozen importlib._bootstrap>", line 1387, in _gcd_import >>> File "<frozen importlib._bootstrap>", line 1360, in >>> _find_and_load >>> File "<frozen importlib._bootstrap>", line 1310, in >>> _find_and_load_unlocked >>> File "<frozen importlib._bootstrap>", line 488, in >>> _call_with_frames_removed >>> File "<frozen importlib._bootstrap>", line 1387, in _gcd_import >>> File "<frozen importlib._bootstrap>", line 1360, in >>> _find_and_load >>> File "<frozen importlib._bootstrap>", line 1331, in >>> _find_and_load_unlocked >>> File "<frozen importlib._bootstrap>", line 935, in _load_unlocked >>> File "<frozen importlib._bootstrap_external>", line 999, in >>> exec_module >>> File "<frozen importlib._bootstrap>", line 488, in >>> _call_with_frames_removed >>> File >>> "C:\Users\chike\AppData\Local\Temp\pip-build-env-pw8idr9h\overlay\Lib\site-packages\setuptools\__init__.py", >>> line 17, in <module> >>> import setuptools.version >>> File >>> "C:\Users\chike\AppData\Local\Temp\pip-build-env-pw8idr9h\overlay\Lib\site-packages\setuptools\version.py", >>> line 1, in <module> >>> import pkg_resources >>> File >>> "C:\Users\chike\AppData\Local\Temp\pip-build-env-pw8idr9h\overlay\Lib\site-packages\pkg_resources\__init__.py", >>> line 2163, in <module> >>> register_finder(pkgutil.ImpImporter, find_on_path) >>> ^^^^^^^^^^^^^^^^^^^ >>> AttributeError: module 'pkgutil' has no attribute 'ImpImporter'. >>> Did you mean: 'zipimporter'? >>> [end of output] >>> >>> note: This error originates from a subprocess, and is likely not a >>> problem with pip. >>> error: subprocess-exited-with-error >>> >>> × Getting requirements to build wheel did not run successfully. >>> │ exit code: 1 >>> ╰─> See above for output. >>> >>> note: This error originates from a subprocess, and is likely not a >>> problem with pip. >>> >>> >>> Are there separate steps for installing on Windows? >>> >>> >>> Best regards, >>> Nnamdi >>> On Monday, August 4, 2025 at 2:45:09 PM UTC-4 bzo...@wisc.edu wrote: >>> >>>> Hi Dan and Nnamdi, >>>> >>>> To add up, since the FSI and VSG support is not yet merged into the >>>> main branch, if you want to use the PyChrono with FSI / VSG to simulate >>>> granular terrain in addition to DEME, you need to use our special FSI >>>> version rather than the regular version I posted in previous email. The >>>> special FSI version can be installed via the following command in a NEW >>>> environment: >>>> >>>> conda create -n chrono_test "python<3.13" -c conda-forge >>>> conda install bochengzou::pychrono -c bochengzou -c nvidia -c dlr-sc -c >>>> conda-forge >>>> >>>> Best, >>>> >>>> Bocheng >>>> >>>> >>>> On 8/4/25 18:24, 'Dan Negrut' via ProjectChrono wrote: >>>> >>>> That functionality for running granular problems from python: see >>>> pyDEME, https://github.com/projectchrono/DEM-Engine >>>> <https://urldefense.com/v3/__https://github.com/projectchrono/DEM-Engine__;!!Mak6IKo!PkKSZCuBiSh-FgdG1GZVwOgPEWrn62SHqzHo482EL_A5V21Isb_oAn9S5AMaFqcONBr_5uh8rK27fuyFYz0y7JL9Uuc2CA$>. >>>> >>>> >>>> We’ll probably have one integrated way to install everything (chrono & >>>> DEM support) coming up in the very near future – next three months, most >>>> likely. That’ll be through conda forge, a one line command, hopefully. >>>> >>>> Dan >>>> >>>> --------------------------------------------- >>>> >>>> Bernard A. and Frances M. Weideman Professor >>>> >>>> NVIDIA CUDA Fellow >>>> >>>> Department of Mechanical Engineering >>>> >>>> Department of Computer Science >>>> >>>> University of Wisconsin - Madison >>>> >>>> 4150ME, 1513 University Avenue >>>> >>>> Madison, WI 53706-1572 >>>> >>>> 608 772 0914 <(608)%20772-0914> >>>> >>>> http://sbel.wisc.edu/ >>>> >>>> http://projectchrono.org/ >>>> <https://urldefense.com/v3/__http://projectchrono.org/__;!!Mak6IKo!PkKSZCuBiSh-FgdG1GZVwOgPEWrn62SHqzHo482EL_A5V21Isb_oAn9S5AMaFqcONBr_5uh8rK27fuyFYz0y7JLqDzYZVw$> >>>> >>>> --------------------------------------------- >>>> >>>> >>>> >>>> *From:* 'Nnamdi Chikere' via ProjectChrono <projec...@googlegroups.com> >>>> *Sent:* Monday, August 4, 2025 1:14 PM >>>> *To:* ProjectChrono <projec...@googlegroups.com> >>>> *Subject:* Re: [chrono] SDL2 Library Error while running PyChrono >>>> >>>> >>>> >>>> Thank you very much. Adding the "/" character resolved the issue. Does >>>> this version include the capability to simulate granular systems on Windows >>>> using Python? >>>> >>>> >>>> >>>> Best regards, >>>> >>>> Nnamdi >>>> >>>> On Monday, August 4, 2025 at 2:07:48 PM UTC-4 bzo...@wisc.edu wrote: >>>> >>>> Hi Nnamdi, >>>> >>>> Thank you for the follow up. Yes, on Apr 27, 2025, we renamed SetPlane >>>> to SetReferenceFrame. The details can be found at >>>> https://github.com/projectchrono/chrono/commit/59e3cb4ba24dbb258aa1543a971507a7d0bf2689 >>>> <https://urldefense.com/v3/__https:/github.com/projectchrono/chrono/commit/59e3cb4ba24dbb258aa1543a971507a7d0bf2689__;!!Mak6IKo!NTQLCak0Iwl-Hfht85Jhg4qWkG-A7VWM6pEEbrx0f8_cvW7ySAQlRFoQ1N0NTjfNyeBXHkTouURQJFrnTRiy0LLg6XM$> >>>> >>>> For the "Cannot open colormap data file >>>> C:/Users/chike/Box/TurtleRobotExperiments/Sea_Turtle_Robot_AI_Powered_Simulations_Project/NnamdiFiles/mujocotest1/chrono/data../data/colormaps/jet-table-float-0512.csv" >>>> issue, did you put a "/" character at the end of your >>>> "chrono.SetChronoDataPath()" call? For example, you need to use >>>> chrono.SetChronoDataPath("C:/Users/chike/Box/TurtleRobotExperiments/Sea_Turtle_Robot_AI_Powered_Simulations_Project/NnamdiFiles/mujocotest1/chrono/data/") >>>> instead >>>> of >>>> chrono.SetChronoDataPath("C:/Users/chike/Box/TurtleRobotExperiments/Sea_Turtle_Robot_AI_Powered_Simulations_Project/NnamdiFiles/mujocotest1/chrono/data") >>>> >>>> Once you applied that fix, could you please update on if the window >>>> crash issue gets resolved? >>>> >>>> Thank you very much! >>>> >>>> Best, >>>> >>>> Bocheng Zou >>>> >>>> On 8/4/25 17:58, 'Nnamdi Chikere' via ProjectChrono wrote: >>>> >>>> Hi Bocheng, >>>> >>>> >>>> >>>> It now works, but it broke certain parts of my code. Seems some of the >>>> API and syntax have changed in this version. I noticed changes in the SCM >>>> >>>> terrain = veh.SCMTerrain(sys) >>>> >>>> *# rotate plane* >>>> >>>> terrain.SetReferenceFrame(chrono.ChCoordsysd( >>>> >>>> chrono.ChVector3d(0, scm_plane_y, 0), >>>> >>>> chrono.QuatFromAngleX(-math.pi / 2) >>>> >>>> )) >>>> >>>> >>>> >>>> *# Previous version used:* >>>> >>>> terrain.SetPlane(chrono.ChCoordsysd( >>>> >>>> chrono.ChVector3d(0, scm_plane_y, 0), >>>> >>>> chrono.QuatFromAngleX(-math.pi / 2)) >>>> >>>> ) >>>> >>>> >>>> >>>> >>>> >>>> Upon updating to the new version, I am now faced with a new error when >>>> running the deformable soil ... >>>> >>>> Cannot open colormap data file >>>> C:/Users/chike/Box/TurtleRobotExperiments/Sea_Turtle_Robot_AI_Powered_Simulations_Project/NnamdiFiles/mujocotest1/chrono/data../data/colormaps/jet-table-float-0512.csv >>>> I have the data path correctly specified at the top of my code using >>>> the chrono.SetChronoDataPath() >>>> >>>> And upon contact with the ground, the window crashes. Do you happen to >>>> have any fixes for this? Also, are there any other changes to the syntax? >>>> >>>> >>>> >>>> Best regards, >>>> >>>> Nnamdi >>>> >>>> On Friday, August 1, 2025 at 10:17:21 PM UTC-4 bzo...@wisc.edu wrote: >>>> >>>> Hi Nnamdi, >>>> >>>> I hope you're doing well. >>>> >>>> We're excited to share that we've refactored the Conda build pipeline >>>> and released updated distributions of PyChrono with improved cross-platform >>>> compatibility, which is likely to resolve the issue you encountered. >>>> >>>> To try out the latest release, please create a new environment and run >>>> the following commands (note that the installation command on the website >>>> is now oudated): >>>> >>>> conda create -n chrono_test python=3.12 -c conda-forge >>>> >>>> conda install pychrono -c projectchrono -c dlr-sc -c conda-forge >>>> >>>> Please let us know if there are any remaining issues. >>>> >>>> Best, >>>> >>>> Bocheng Zou >>>> >>>> >>>> >>>> On 7/31/25 00:48, Bocheng Zou wrote: >>>> >>>> Hi Nnamdi, >>>> >>>> Thank you for providing the information. The Windows conda build for >>>> PyChrono is having know issues recently. We are aware of that and it's >>>> expected to be fixed within the week. If you are in urgent need of >>>> PyChrono, I suggest you build from scratch using cmake (Method A) or use >>>> PyChrono's conda distribution on Linux. >>>> >>>> I will keep you posted once the issue in the Windows conda distribution >>>> is fixed. >>>> >>>> Best, >>>> >>>> Bocheng Zou >>>> >>>> On 7/31/25 00:45, 'Nnamdi Chikere' via ProjectChrono wrote: >>>> >>>> Hello Bocheng, >>>> >>>> >>>> >>>> Thank you for reply. >>>> >>>> I installed PyChrono via method C. PyChrono through Conda (ref: >>>> https://api.projectchrono.org/pychrono_installation.html >>>> <https://urldefense.com/v3/__https:/api.projectchrono.org/pychrono_installation.html__;!!Mak6IKo!MLRxot5akRpE7PKpP5V6eTs6EVAmfOwIgWN8nnv81XgdLQUax6qVtwZPINjM2zrnQxAA_GMxqAg8ScgcDXtHvaj1guZPig$> >>>> ) >>>> >>>> For the last step I installed via conda install >>>> pychrono-9.0.1-py310_5372.tar.bz2 >>>> >>>> >>>> >>>> Best regards, >>>> >>>> Nnamdi >>>> >>>> On Wednesday, July 30, 2025 at 12:18:25 PM UTC-4 bzo...@wisc.edu wrote: >>>> >>>> Hi Nnamdi, >>>> >>>> Thank you for reaching out. I'm Bocheng and I'm a UW-Madison student >>>> responsible for PyChrono distributions. Could you please clarify the >>>> specific way you install the PyChrono? We currently support three ways of >>>> installation on Windows. >>>> >>>> A. Build from scratch using cmake (ref: >>>> https://api.projectchrono.org/tutorial_install_chrono.html >>>> <https://urldefense.com/v3/__https:/api.projectchrono.org/tutorial_install_chrono.html__;!!Mak6IKo!MLRxot5akRpE7PKpP5V6eTs6EVAmfOwIgWN8nnv81XgdLQUax6qVtwZPINjM2zrnQxAA_GMxqAg8ScgcDXtHvahYwqyiWQ$> >>>> ) >>>> >>>> B. Precompiled binaries for Windows (ref: >>>> https://projectchrono.org/download/ >>>> <https://urldefense.com/v3/__https:/projectchrono.org/download/__;!!Mak6IKo!MLRxot5akRpE7PKpP5V6eTs6EVAmfOwIgWN8nnv81XgdLQUax6qVtwZPINjM2zrnQxAA_GMxqAg8ScgcDXtHvahDjDCVhA$> >>>> ) >>>> >>>> C. PyChrono through Conda (ref: >>>> https://api.projectchrono.org/pychrono_installation.html >>>> <https://urldefense.com/v3/__https:/api.projectchrono.org/pychrono_installation.html__;!!Mak6IKo!MLRxot5akRpE7PKpP5V6eTs6EVAmfOwIgWN8nnv81XgdLQUax6qVtwZPINjM2zrnQxAA_GMxqAg8ScgcDXtHvaj1guZPig$> >>>> ) >>>> >>>> Could you please specify the way you install the chrono? This will be >>>> helpful for us to investigate the issue further. >>>> >>>> Best, >>>> >>>> Bocheng Zou >>>> >>>> >>>> >>>> On 7/28/25 21:22, 'Nnamdi Chikere' via ProjectChrono wrote: >>>> >>>> Hello, >>>> >>>> >>>> >>>> I have recently been faced with an error whenever I try to run any >>>> Python programs in PyChrono. Has anyone encountered this before? I use >>>> Visual Studio Code and Pychrono 9.0.1 on a Windows PC. I followed all the >>>> steps for installing Pychrono in a virtual environment. I have tried >>>> uninstalling and reinstalling, but it hasn't helped. Everything worked fine >>>> in the same env, this error just appeared suddenly. Please, I would like >>>> some advice on this. >>>> >>>> >>>> >>>> Best regards >>>> >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "ProjectChrono" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to projectchron...@googlegroups.com. >>>> To view this discussion visit >>>> https://groups.google.com/d/msgid/projectchrono/1f41206d-20f1-48dd-bd2e-73c48d2665fbn%40googlegroups.com >>>> <https://urldefense.com/v3/__https:/groups.google.com/d/msgid/projectchrono/1f41206d-20f1-48dd-bd2e-73c48d2665fbn*40googlegroups.com?utm_medium=email&utm_source=footer__;JQ!!Mak6IKo!J5kXNaPEjXw_OFyqXzUyRfxbYeeLeX3B6PUJwtVXHkPAWJRTx8v6iqVLxYyv7WFxY5Kc7ZNgBvU-1EVwmWr-lIlB3LWUZw$> >>>> . >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "ProjectChrono" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to projectchron...@googlegroups.com. >>>> To view this discussion visit >>>> https://groups.google.com/d/msgid/projectchrono/8b5c5803-6308-461f-a84b-24188f960344n%40googlegroups.com >>>> <https://urldefense.com/v3/__https:/groups.google.com/d/msgid/projectchrono/8b5c5803-6308-461f-a84b-24188f960344n*40googlegroups.com?utm_medium=email&utm_source=footer__;JQ!!Mak6IKo!MLRxot5akRpE7PKpP5V6eTs6EVAmfOwIgWN8nnv81XgdLQUax6qVtwZPINjM2zrnQxAA_GMxqAg8ScgcDXtHvaghyluLsg$> >>>> . >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "ProjectChrono" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to projectchron...@googlegroups.com. >>>> >>>> To view this discussion visit >>>> https://groups.google.com/d/msgid/projectchrono/75f5b824-28fe-44ae-95eb-8d765a9262d0n%40googlegroups.com >>>> 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