Thanks for the feedback.
Basically I need to do a round robin (-perhost 1) approach on all hosts in the machinefile so that I can transfer the data to each PC only once, and once this is finished I run another mpiexec exe so that each host can have the MAX processes running on it doing a calculation addressing the data sent from the previous mpiexec.
I would like to do this with both mpiexec's addressing the same machinefile for consistency reasons.
I guess the main issue is running the first mpiexec only once per host when the machinefile is setup like
Thanks for help.