The Ohio Supercomputer Center (OSC) is experiencing an email delivery problem with several types of messages from MyOSC. 

Cannot use mpiexec/mpirun from OpenMPI in an interactive session


We found mpiexec/mpirun from OpenMPI can not be used in an interactive session (launched by sinteractive) after upgrading Pitzer and Owens to Slurm 20.11.4. Please use srun only while you use OpenMPI in an interactive session.