>I think if you use MPI_Isend it work correctly!
>test this and write me what happen!
yep, that's the first thought I had myself, but in spite of being
non-blocking, the Isend routine gets stuck and segmentates exactly
with the same error message as before.
I'm just wondering how MPI_sendrecv is implemented. I was expecting it
to be exactly equivalent to one send + one receive. Does anyone know
the details of the implementation in openmpi?