I'm HPC Admin. I have installed MPI4PY Library on clusters by .tar and Pip2.7(python2.7). After that, we are facing the issue like a 256cores job (n=4,ppn=64) is not running on nodes. It happened after installing MPI4PY(3.0). normal python code is running.
Users unable to run jobs on Cluster like VASP,MPI4PY, mpi, openmpi, etc.