Hi @jankap. As an alternative to the other (excellent) packages mentioned so far, I just announced a new package called SystemsOfSystems. It seems to do precisely what you’re describing. I remember seeing this post years ago and thought I would follow up. Fair warning: it can absolutely be a Simulink replacement, but it also works in a fundamentally different way, so there’s a bit of a mindset shift coming from something like Simulink.