Will this bit of code work: if (rank .eq. <somerank>) then
*change var* call MPI_Bcast(var, 1, MPI_INTEGER, rank, & MPI_COMM_WORLD, errstat) end if call MPI_Barrier(MPI_COMM_WORLD, errstat) I'm using a int variable on all processors. At some point some process can change its value of this variable. I then need to let all other processes know the new value. So I tried to use MPI_Bcast for this. But I think MPI waits indefinitely at MPI_Barrier. I'm now wondering if MPI_Bcast must be executed by all processes, similar to MPI_Barrier. Is this correct? many thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423