I am very sad to see that RMA has reverted to a state of brokenness ala Open-MPI 1.x when it comes to the use of datatypes. Open-MPI 3.x worked great for me and I had started to use Open-MPI by default on some platforms.
https://github.com/open-mpi/ompi/issues/6275 has details. The issues appear with shared-memory, which is a pretty important conduit. Jeff -- Jeff Hammond jeff.scie...@gmail.com http://jeffhammond.github.io/
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