Hello MVAPICH team, Here is a patch to v1.7 that I'd like to add to v1.9. It fixes a bug on PSM systems in which an MPI job is started from another, e.g., a python+MPI test framework that mpiruns lots of other MPI jobs as test cases. https://github.com/hpc/mvapich2-cce/commit/44c904359fc2325efc7b282998264d1a73a7639a -Adam