Andrej, you *have* to invoke mpirun --mca plm slurm ... from a SLURM allocation, and SLURM_* environment variables should have been set by SLURM (otherwise, this is a SLURM error out of the scope of Open MPI).
Here is what you can try (and send the logs if that fails) $ salloc -N 4 -n 384 and once you get the allocation $ env | grep ^SLURM_ $ mpirun --mca plm_base_verbose 10 --mca plm slurm true Cheers, Gilles On Tue, Feb 2, 2021 at 9:27 AM Andrej Prsa via devel <devel@lists.open-mpi.org> wrote: > > Hi Gilles, > > > I can reproduce this behavior ... when running outside of a slurm > > allocation. > > I just tried from slurm (sbatch run.sh) and I get the exact same error. > > > > > What does > > $ env | grep ^SLURM_ > > reports? > > Empty; no environment variables have been defined. > > Thanks, > Andrej >
