[mpich-discuss] Help with mpich2 1.3a1 on i7-920

[Gaetano Bellanca]

Dear Rajeev and Pavan,

thanks for your answers. I tried using MPI_IN_PLACE in MPI_GATHER in the 
position of the send buffer, but probably I didn't understand correctly 
its use. In fact, I'm still having errors.

Fatal error in MPI_Gather: Invalid buffer pointer, error stack:
MPI_Gather(761): MPI_Gather(sbuf=MPI_IN_PLACE, scount=1, MPI_LOGICAL, 
rbuf=0x187f0b0, rcount=1, MPI_LOGICAL, root=0, comm=0x84000002) failed
MPI_Gather(682): sendbuf cannot be MPI_IN_PLACE

However, it works using separate buffers as input and output.

Regards.

Gaetano