RMA/RDMA error

[jpoto]

I get the error:

'''
*** An error occurred in MPI_Win_attach
*** reported by process [2438135809,1]
*** on win rdma window 5
*** MPI_ERR_RMA_ATTACH: Could not attach RMA segment
*** MPI_ERRORS_ARE_FATAL (processes in this win will now abort,
*** and potentially your MPI job)
1 more process has sent help message help-mpi-errors.txt / mpi_errors_are_fatal
Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error message
'''

after several successful contractions.

[jpoto]

I vaguely remember that there is an environment variable (OMPI_MCA) to fix it, but I forgot which one.