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               program Parallel_Example_1
        use imsl
        use linear_operators
        use mpi_setup_int
        use mpi
        implicit none

        integer, parameter :: n=32, nr=4
        real(kind(1e0)) :: one=1e0
        real(kind(1e0)), dimension(n,n,nr) :: A, b, x, err(nr)

        MP_NPROCS=MP_SETUP()

        ! Generate random matrices for A and b:
        A = rand(A)
        b = rand(b)

        ! Compute the box solution matrix of Ax = b.
        x = A .ix. b

        ! Check the results.
        err = norm(b - (A .x. x))/(norm(A)*norm(x)+norm(b))
        if (ALL(err <= sqrt(epsilon(one))) .and. MP_RANK == 0) &
                write (*,*) 'Parallel Example 1 is correct.'

        ! See to any error messages and quit MPI.
        MP_NPROCS=MP_SETUP('Final')

        end program Parallel_Example_1

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*** FATAL  ERROR 1 from MPI_INIT. A CALL was excuted using the IMSL
***        dummy routine. Parallel performance needs a functioning MPI
***        library

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[ Last edited by onesupeng on 2010-5-19 at 03:10 ]
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