Also, doing this doesn't help; again it seems like subpop 1 isn't being evaluated. eval = ec.coevolve.MultiPopCoevolutionaryEvaluator eval.subpop.0.num-rand-ind = 20 eval.subpop.1.num-rand-ind = 20 eval.subpop.0.num-elites = 0 eval.subpop.1.num-elites = 0 eval.subpop.0.num-ind = 0 eval.subpop.1.num-ind = 0 --Rob