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Routine
psmile_def_mpi_comm (ierror)
Subroutine PSMILe_Def_MPI_Comm defines the communicators
if all processes were simultaneously started by the mpirun/mpiexec
command.
The routine assumes that communicator "comm_global"
is defined.
It
constructs
the communicator for the application "Appl%comm",
the user communicator of the application "Appl%comm_user" and
the communicator with the coupler "comm_coupler".
the
communicator for the PSMILe library "comm_psmile"
as the drievr is calling on its side prismdrv_def_mpi_comm.