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Routine
prismdrv_init (id_err)
Subroutine "PRISMDrv_Init" initializes the MPI context of
the driver application (rank in MPI_COMM_WORLD, PRISMdrv_root) and open
the dedicated local output files.
Initialisation
of variables (not arrays) contained in PRISMDrv module.
Call MPI_Init
Check rank of the application driver in MPI_COMM_WORLD. MPI_COMM_WORLD
contains all the procs of the driver and of the different applications
Determine PRISMdrv_root (min rank among all the procs of MPI_COMM_WORLD
but with the proc of the psmile put to huge).
Open and redirect local output files