Thank you for your script.
I have run it with “ff-mpirun -n 4 sphere3.edp -mat_view ascii:Poisson” and I get a “Poisson” textfile containing a matrix description.
But it seems it is only one partition? At least it says “Mat Object: 1 MPI processes”.
How can I get all the submatrices? Is there a way to visualize the subdomains?