Hi,
I just realized that the Parallel Studio 2019 initial release is using MPICH 3.3b2 which is a buggy release as reported here:
https://lists.mpich.org/pipermail/discuss/2018-April/005447.html
I confirm that the tag upper limit initialization is not fixed in this release (see mpich commit: c597c8d79deea22) and is a problem for all PETSc users.
What a bad choice for an official release!!!
Please consider releasing with MPICH 3.3b3 instead, or no MPI at all!
Eric