Unable to Write XDMF File

[CastriMik]

I cannot reproduce the error on my PC. However, a similar error has been reported in the post below. It seems to be related to MPI. How are you running your code?

Error executing dolfinx on a cluster via a singularity container

Hi, I am having trouble running dolfinx in parallel on a HPC cluster. To begin, I pull the latest image from docker hub singularity pull --name dolfinx.sif docker://dolfinx/dolfinx:latest then try to run the following MWE: from dolfinx.io import XDMFFile from dolfinx import fem from dolfinx.mesh import create_unit_cube, CellType from mpi4py import MPI comm = MPI.COMM_WORLD mesh = create_unit_cube(comm, 50, 50, 50, CellType.tetrahedron) V = fem.FunctionSpace(mesh, ("CG", 1)) u = fem.Function…