Lars Bilke <lars.bi...@ufz.de> writes: > The issue seems that openmpi is version 5.x but mpi4py is compiled against > version 4.x.
That does fix it, thanks. Maybe packages built against MPI 4.x should be upgraded to the default MPI version, because the docs say: "The Open MPI v5.0.x series shared libraries are ABI compatible with Open MPI v4.0.x and v4.1.x, with a few exceptions for Fortran." https://docs.open-mpi.org/en/v5.0.x/version-numbering.html
