Re: [Boost-users] [mpi] what is the equivalent of MPI_COMM_SELF?

Do you need this regularly? I have never seen any need for this   before. Have you have a real need?

I just started using both MPI and Boost.MPI so I don't know, and most of the use is only investigative. I just found that sometimes replacing "world" by "self" can change from parallel syncronized behavior to unsyncronized behavior very easily, for example when debugging. here it is an example in which just changing WORLD by SELF changes de behavior of the program: https://computation.llnl.gov/casc/ppf/ppf.html But maybe you are right, maybe there is no real need and I can live without it. I noticed that world and self (or null) are treated asymmetrically in the Boost.MPI syntax. just that. Alfredo