Loadable Function: INFO = MPI_Barrier (COMM)

Block processes in the communicator COMM untill the call to this routine has been reached by all. The communicator object COMM (loaded with MPI_Comm_Load) must be specified otherwise an error occurs.

             INFO (int) return code
                0 MPI_SUCCESS    No error
                5 MPI_ERR_COMM   Invalid communicator (NULL?)
               13 MPI_ERR_ARG    Invalid argument (typically a NULL pointer?)