I rebuilt and examined the logs more closely. There was a warning about a failure with the external hwloc, and that led to finding that the CentOS hwloc-devel package was not installed.
I also added the options that we have been using for a while, --disable-dlopen and --enable-shared, to the configure line, and now it runs with srun, both in its bare form srun ./test_mpi and specifying the pmix type srun --mpi=pmix_v2 ./test_mpi I will probably try to figure out whether either of the two configure options were the culprit. I have a suspicion that there might have been a cascade of errors from the missing hwloc, however. -- bennet _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
