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Commit b2bbc154 authored by Mark OLESEN's avatar Mark OLESEN
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ENH: use MPI Get_elements_x() for message sizes (#3152) 

- ensures more accurate values for message sizes than using
  MPI Get_count(), which trucates at INT_MAX

- add more/better error messages when trying to receive messages
  that exceed INT_MAX or the char buffer lengths
parent 7b38b148
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