Issue with installing pychrono

[harshamarupudi56]

Hello I am currently attempting to create a conda environment to run a repository that makes use of pychrono as a dependency. However I have been receiving this error regarding pychrono. lib64limb.so.6 GLIBC 2.66. I am currently on Python 3.8. I have read that a solution is to revert Python to version 3.7, however I have seen users who are able to utilize it on Python 3.8 so I do not think that is the issue.

[thepianoboy]

Could you please let us know what OS (including distribution and version, where applicable) you are running on, what conda channels you are using, as well as any non-default packages you have in your environment?

[qiancao]

Hi @thepianoboy, thank you for responding. I work with @harshamarupudi56 and can respond to some of these questions. We're working on a computer with Ubuntu 18.04 installed.

The packages are installed in a fresh conda environment with:

conda env create -f environment.yml

where the yml file is defined as:

name: chronoenv
channels:
  - conda-forge
dependencies:
  - python
  - numpy
  - scipy
  - numba
  - mkl
  - matplotlib
  - scikit-image
  - scikit-learn
  - spyder
  - ipython
  - glob2
  - projectchrono::pychrono
  - pip
  - pip:
    - pynrrd # image/data file formats
    - pydicom
    - h5py
    - nibabel
    - meshio
    - trimesh
    - tetgen
    - vtk
    - pyvista
    - pyvistaqt
    - pyradiomics
    - umap-learn 
    - edt 
    - skan
    - cvxopt # convex optimization

When trying to import pychrono, the error message reads:

File "FEA/fea.py", line 22, in <module> import pychrono as chrono File "/home/usr/anaconda3/envs/chronoenv/lib/python3.8/site-packages/pychrono/__init__.py", line 44, in <module> from .core import * File "/home/usr/anaconda3/envs/chronoenv/lib/python3.8/site-packages/pychrono/core.py", line 13, in <module> from . import _core ImportError: /lib64/libm.so.6: version GLIBC_2.29' not found (required by /home/usr/anaconda3/envs/chronoenv/lib/python3.8/site-packages/pychrono/_core.so)`

The library complains GLIBC 2.29 not found because Ubuntu 18.04 does not use GLIBC 2.29. From what I've read, it is also not possible to upgrade GLIBC without breaking the OS. Could we patch this such that the requirement on GLIBC is not so strict? I think Ubuntu 18.04 comes with GLIBC 2.17.

Thanks!