Hey there, I've been using SC for a while and something has been bugging me - given a state machine with: OuterSt, OneSt and TwoSt as well as OneEv and TwoEv that are handled by OneSt and TwoSt respectively, it is possible to send a wrong event to either of the last two states. Such an "unhandled" event will be forwarded to OuterSt and then quietly eaten. My question is as follows - is it possible to define some kind of "catch all" handler in the OuterSt? I have already fixed a tricky bug in my code where a submitted event was lost, and wonder if there is a simple way to handle these situations? I can certainly add a custom_reaction<>(X) for each possible event to the OuterSt and catch issues that way, but that's far from ideal. Any suggestions would be appreciated. P.S. perhaps a compromise solution would be to add something like this to OuterSt: sc::bug<OneEv> sc::bug<TwoEv> but that would effectively limit handling to issuing an assert(false)... Thanks, Oleg.