Is OpenMPI backwards compatible? I.e. If I am running 1.3.1 on one
machine and 1.3.3 on the rest, is it supposed to work? Or do they all
need exactly the same version?
When I add this wrong version machine to the machinelist, with a
simple "hello world from each process type program", I see no output
what soever, even with the verbose flag - it just sits there