500 instances with multi-instance CESM 1.2.2 and it complains too many communicators

jedwards

CSEG and Liaisons
Staff member
This is an MPI library issue, you'll need to consult your MPI expert or documentation to see if there is a way to increase the maximum number of communicators allowed.   https://trac.mpich.org/projects/mpich/ticket/1768
 
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