This occurs if one uses an incompatible mpiexec [to the mpi that PETSc was installed with.
I see you've installed using -download-mpich So the compatible mpiexec here is MPIEXEC = /home/slave12/projects/petsc/arch-linux-c-debug/bin/mpiexec So try: /home/slave12/projects/petsc/arch-linux-c-debug/bin/mpiexec -n 4 ./ex50 Satish On Mon, 19 Dec 2022, Guilherme Lima wrote: > Hello, > I'm having an issue with my PETSc installation. It started with an > unexpected output on src/ksp/ksp/tutorial ex50, then tried doing the > configuring early steps again and here I am. > It can't execute more than 1 MPI process, also at the example that I > mentioned before, using "mpiexec -n 4 ... " it appeared to have executed > the same interaction 4 times, instead of 1 time with 4 processors. > Hope I've been clear about what is the problem. >
