undefined symbol: MPI_Aint_add

[Andrei Kulikovsky]

Hello everyone,

All of a sudden I got an error from the code I have run many times:

from mpi4py import MPI
ImportError: /home/andrei/miniconda3/envs/Dbc_Nx_Lcab/lib/python3.10/site-packages/mpi4py/MPI.cpython-310-x86_64-linux-gnu.so: undefined symbol: MPI_Aint_add

I run this Python code under Ubuntu 22.10,  mpi4py 3.1.4 is installed. Attempt to reinstall it using pip does not help. I would appreciate any help.

Best,

Andrei 

[Lisandro Dalcin]

What's the output of the following command?

ldd /home/andrei/miniconda3/envs/Dbc_Nx_Lcab/lib/python3.10/site-packages/mpi4py/MPI.cpython-310-x86_64-linux-gnu.so

My guess is that you have some wrong entry in LD_LIBRARY_PATH, or perhaps your MPI package got updated, and you have to reinstall mpi4py:

pip cache remove mpi4py # to remove any previously built wheel file from pip's cache and force a rebuild next time

pip install --force mpi4py

Does that work?