I am trying to create a package on conda-forge: https://github.com/conda-forge/staged-recipes/pull/9965 But the CI fails with conflicts. Has anyone tried to to that?

Hi!

I tried to install pychrono on MacOS X 10.14.6 within a clean conda environment and when I try to import pychrono, I got a 'Segmentation fault: 11"

here's my environment :

# packages in environment at /Users/thibault/anaconda3/envs/assembly:
#
# Name                    Version                   Build  Channel
appnope                   0.1.0            py36hf537a9a_0  
backcall                  0.1.0                    py36_0  
bzip2                     1.0.8                h1de35cc_0  
ca-certificates           2019.8.28                     0  
certifi                   2019.9.11                py36_0  
decorator                 4.4.0                    py36_1  
icu                       58.2                 h4b95b61_1  
intel-openmp              2019.4                      233  
ipython                   7.8.0            py36h39e3cac_0  
ipython_genutils          0.2.0            py36h241746c_0  
jedi                      0.15.1                   py36_0  
libboost                  1.67.0               hebc422b_4  
libcxx                    4.0.1                hcfea43d_1  
libcxxabi                 4.0.1                hcfea43d_1  
libedit                   3.1.20181209         hb402a30_0  
libffi                    3.2.1                h475c297_4  
libiconv                  1.15                 hdd342a3_7  
mkl                       2019.4                      233  
ncurses                   6.1                  h0a44026_1  
openssl                   1.1.1d               h1de35cc_2  
parso                     0.5.1                      py_0  
pexpect                   4.7.0                    py36_0  
pickleshare               0.7.5                    py36_0  
pip                       19.2.3                   py36_0  
prompt_toolkit            2.0.10                     py_0  
ptyprocess                0.6.0                    py36_0  
pychrono                  4.0.0                  py36_402    projectchrono
pygments                  2.4.2                      py_0  
python                    3.6.9                h359304d_0  
readline                  7.0                  h1de35cc_5  
setuptools                41.4.0                   py36_0  
six                       1.12.0                   py36_0  
sqlite                    3.30.0               ha441bb4_0  
tk                        8.6.8                ha441bb4_0  
traitlets                 4.3.3                    py36_0  
wcwidth                   0.1.7            py36h8c6ec74_0  
wheel                     0.33.6                   py36_0  
xz                        5.2.4                h1de35cc_4  
zlib                      1.2.11               h1de35cc_3  

Is there a quick way to fix this :) ? Thank you very much ! Thibault.

I am on Windows 10, Anaconda 3 v 2018.12 (latest)

I tried to install via conda install -c projectchrono pychrono via Anaconda Console (ran as admin) and got

Collecting package metadata: done
Solving environment: failed

PackagesNotFoundError: The following packages are not available from current cha
nnels:

  - pychrono

I then tried conda install -c projectchrono/label/develop pychrono and it installed without error but running python line import pychrono as chrono (e.g. any of the demo files) gives the following exception

C:\ProgramData\Anaconda3\python.exe C:/wd/cd/jutil/chrono_demos/demo_masonry.py
Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\site-packages\pychrono\core.py", line 14, in swig_import_helper
    return importlib.import_module(mname)
  File "C:\ProgramData\Anaconda3\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 670, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 583, in module_from_spec
  File "<frozen importlib._bootstrap_external>", line 1043, in create_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
ImportError: DLL load failed: The specified module could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/wd/cd/jutil/chrono_demos/demo_masonry.py", line 18, in <module>
    import pychrono.core as chrono
  File "C:\ProgramData\Anaconda3\lib\site-packages\pychrono\__init__.py", line 7, in <module>
    from .core import *
  File "C:\ProgramData\Anaconda3\lib\site-packages\pychrono\core.py", line 17, in <module>
    _core = swig_import_helper()
  File "C:\ProgramData\Anaconda3\lib\site-packages\pychrono\core.py", line 16, in swig_import_helper
    return importlib.import_module('_core')
  File "C:\ProgramData\Anaconda3\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
ModuleNotFoundError: No module named '_core

The first two Pychrono tutorials fail upon execution.

demo_python_2.py fails with:

time= 0.45000000000000023  bodyB y= 0.9982750315016988
Traceback (most recent call last):

  File "<ipython-input-1-31da8eea56df>", line 1, in <module>
    runfile('/home/felix/dev/pychrono-tutorials/demo_python_2.py', wdir='/home/felix/dev/pychrono-tutorials')

  File "/home/felix/anaconda3/lib/python3.7/site-packages/spyder_kernels/customize/spydercustomize.py", line 704, in runfile
    execfile(filename, namespace)

  File "/home/felix/anaconda3/lib/python3.7/site-packages/spyder_kernels/customize/spydercustomize.py", line 108, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "/home/felix/dev/pychrono-tutorials/demo_python_2.py", line 90, in <module>
    my_system.GetContactContainer().ReportAllContacts(my_rep)

  File "/home/felix/anaconda3/lib/python3.7/site-packages/pychrono/core.py", line 16530, in ReportAllContacts
    return _core.ChContactContainer_ReportAllContacts(self, *args)

RuntimeError: SWIG director method error. Error detected when calling 'ReportContactCallback.OnReportContact'

The "Report Contact Callback" and "Simulation loop" sections should be commented out until the "Add contact callback" is fixed.

demo_python_1.py fails on the line ma.SetMatr(mlist) with this error:

[...]
quat. product= [ 30, 0, 0, 0 ]
Traceback (most recent call last):

  File "<ipython-input-3-80a9b323cce9>", line 1, in <module>
    runfile('/home/felix/dev/pychrono-tutorials/demo_python_1.py', wdir='/home/felix/dev/pychrono-tutorials')

  File "/home/felix/anaconda3/lib/python3.7/site-packages/spyder_kernels/customize/spydercustomize.py", line 704, in runfile
    execfile(filename, namespace)

  File "/home/felix/anaconda3/lib/python3.7/site-packages/spyder_kernels/customize/spydercustomize.py", line 108, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "/home/felix/dev/pychrono-tutorials/demo_python_1.py", line 53, in <module>
    ma.SetMatr(mlist)   # Create a Matrix from a list. Size is adjusted automatically.

AttributeError: 'ChMatrixDynamicD' object has no attribute 'SetMatr'

If someone can give a hint about how to fix that issue, I can submit a PR along with some other minor fixes.

The following snippet recreates the problem.

ChNodeFEAxyz node1(ChVector<>(42.0, 42.0, 42.0));
ChNodeFEAxyz node2(ChVector<>(0.0, 0.0, 0.0)); 
node2 = node1; // Fails.

The last line causes infinite recursion. I found the problem in the source code. I also verified the recursion by building the source with debug information and stepping through it. It seems like a simple fix on the surface but I don't know enough about all the possible side effects to be able to fix the issue myself.

We are still using version 4.0, because 5.0 proved unstable (corrupted memory causing access violation errors). Can this fix be cherry-picked into 4.0?

I see the following error when trying to run this example, any help is appreciated! Thanks

File "C:\Users\pervez\Anaconda3\Lib\site-packages\pychrono\demos\core\demo_CH_buildsystem.py", line 77, in my_system.GetContactContainer().ReportAllContacts(my_rep)

File "C:\Users\pervez\Anaconda3\lib\site-packages\pychrono\core.py", line 25440, in ReportAllContacts return _core.ChContactContainer_ReportAllContacts(self, callback)

RuntimeError: SWIG director method error. Error detected when calling 'ReportContactCallback.OnReportContact'

Hi, The project has been successfully compiled, however the demo example 'demo_IRR_collision_trimesh.exe' ended up with following errors:

Copyright (c) 2017 projectchrono.org Chrono version: 6.0.0

Irrlicht Engine version 1.8.4 (Build 9200) Using renderer: Direct3D 9.0 Intel(R) UHD Graphics igdumdim64.dll 27.20.100.8853 Currently available Video Memory (kB): 4187136 Could not load shader function D3DXAssembleShader from dll, shaders disabled: d3dx9_43.dll Could not create vertex shader. Could not create vertex shader. Resizing window (1280 720) Resetting D3D9 device. Could not load shader function D3DXCompileShader from dll, shaders disabled: d3dx9_43.dll Loaded texture: C:/Arbeid/Softs/Chrono/chrono-build/bin/data/fonts/arial80.bmp PNG warning: iCCP: known incorrect sRGB profile Loaded texture: C:/Arbeid/Softs/Chrono/chrono-build/bin/data/logo_chronoengine_alpha.png Loaded texture: C:/Arbeid/Softs/Chrono/chrono-build/bin/data/skybox/sky_lf.jpg Loaded texture: C:/Arbeid/Softs/Chrono/chrono-build/bin/data/skybox/sky_dn.jpg Loaded texture: C:/Arbeid/Softs/Chrono/chrono-build/bin/data/skybox/sky_up.jpg Loaded texture: C:/Arbeid/Softs/Chrono/chrono-build/bin/data/textures/concrete.jpg Could not open file of texture: XEFFECTS_SM_512 XEffects: Please ignore previous warning, it is harmless. Could not open file of texture: XEFFECTS_SM_512_2 XEffects: Please ignore previous warning, it is harmless.

Does anybody know why?

Hi.

I am experiencing very different performance from windows to mac when executing the same model: https://github.com/INTO-CPS-Association/chronofmu/blob/ffo/Chrono_model/source/robotti_source.cpp

In windows, I can execute this with the arguments: 300 60 0 1 and 1 second simulation time takes 2.46653 seconds real-time. On mac catalina 10.15.4, 1 second simulation time takes 42.9905 seconds.

I have checked the outputs of the model, and they are equal.

Mac gcc-version:

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 11.0.3 (clang-1103.0.32.62)
Target: x86_64-apple-darwin19.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz Ram: 16 GB

Windows visual studio 2019 and thereby MSCV v142 INtel Core i7-5600U CPU @ 2.6 GHz RAM 12,0 GB

Is this something you are aware of or can help me pinpoint?

I've installed Chrono with this guide. I then proceed to install pychrono module using this (Note, the process intertwines with the installing Chrono, they are not separate). I've also installed Anaconda and use that to install pychrono library. After activating the conda environment, I tried importing the pychrono library but no luck.

C:\Users\STUDENT\Desktop\New folder (2)>conda activate base
(base) C:\Users\STUDENT\Desktop\New folder (2)>py
Python 3.7.4 (default, Aug  9 2019, 18:34:13) [MSC v.1915 64 bit (AMD64)] :: Anaconda, Inc. on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import pychrono
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\STUDENT\Anaconda3\lib\site-packages\pychrono\__init__.py", line 7, in <module>
    from .core import *
  File "C:\Users\STUDENT\Anaconda3\lib\site-packages\pychrono\core.py", line 13, in <module>
    from . import _core
ImportError: DLL load failed: A dynamic link library (DLL) initialization routine failed.
>>>                                                                                           

I googled the error but all that came up is TensorFlow library, not pychrono.

I cannot build the FSI module, the following error lists pops out:

note: other modules including IRRLICHT work perfectly.

Do you have any idea what could be the problem?

There was a reference to Irrlicht that was not #ifdef'd. I also #ifdefd some of the visualization configuration to better show what is not needed when visualization is unused.

"Precompiled Project Chrono 7.0.1 for Windows is in the works and will be available soon."

Will be really soon precompilled Chrono 7.0.x for Windows 10 64 bit?

Hello, I did fresh installation on my Windows and I've encountered with the running issue. My script failed on the line import pychrono as chrono where after run under the spyder I've got this error message

runfile('C:/Users/.spyder-py3/temp.py', wdir='C:/Users/LEGION/.spyder-py3')
Traceback (most recent call last):

  File "D:\Anaconda3\envs\chrono\lib\site-packages\spyder_kernels\py3compat.py", line 356, in compat_exec
    exec(code, globals, locals)

  File "c:\users\legion\.spyder-py3\temp.py", line 4, in <module>
    import pychrono as chrono

  File "D:\Anaconda3\envs\chrono\lib\site-packages\pychrono\__init__.py", line 48, in <module>
    from .core import *

  File "D:\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) (D:\Anaconda3\envs\chrono\lib\site-packages\pychrono\__init__.py)

As noted in #300, for Unix systems Chrono's cmake config file is installed to <prefix>/lib/cmake/, but this is not a default search location for cmake's find_package function. This changes the install path to <prefix>/lib/cmake/Chrono, which is one of the default search paths.

Fixes #300.

Hello, I am trying to get the contact forces from particles to a defined mesh, but I can only get the sum of the forces using "Collectmeshcontactforce" in GPU. Is there a way to get the individual contact forces from particles to the mesh for each particle, instead of just the sum of the contact forces on one mesh?

As instructed I have installed OpenMPI that is required to build Synchrono module When tried to build, it gives me error that MPI is not found (Refer image3) Can someone help me out with a solution Please refer attached images for the issue

Hello Team,

I am new to Docker and Project Chrono. I was able to install PyChrono through anaconda and run python demo files, but while building a docker received an error that irrlicht module was not found. So I tried using the docker image provided by running the "docker pull uwsbel/projectchrono:latest" command and running the container but not entirely sure how to run python files with it so that it will visualize the project.