There seems to be a pathfinding issue with supreme commander. What happens is the current action flickers on and off rapidly and causes the sim to stand still and do nothing. I have noticed this with the toilet action, not sure if it happens with other actions as well. It doesn't happen if I disable supreme commander on that sim and allow the sim to autonomously use the toilet.
Test town: Sunset valley
Installed: World adventures, Ambitions, super computer, awesome mod