Hey! Thanks for your fast and helpful response! One point regarding the "favor_compile_time" approach: I've alrady used it for the outermost and all enclosed submachines already. Unfortunately I couldn't detemine such a deep performance advantage. But one comment makes me a bit sceptical: two days avo you have suggested another user to also use favor_compile_time in context with the eUML front-end and kleene events, but according to your comment it has a disadvantage: the statemachines will lose the hierarchical support. Will this also happen for the functor-frontend? Maybe I've misunderstood something... Ciao, Rafael -- View this message in context: http://boost.2283326.n4.nabble.com/Boost-MSM-cc1plus-exe-error-out-of-memory... Sent from the Boost - Users mailing list archive at Nabble.com.