[Alan Anderson]

I wish I could remember exactly what was going on when this happened to us a couple of days ago. I can tell you that I discovered one vi stuck in a loop. If you run Robot Main interactively, you can look at the "run" button of each SubVI it calls. Some of them will be in the black "running" state. Some of them might be white with a black line or dot, and hovering the mouse pointer over it tells you that vi is "waiting to run". That might give you a clue about where to focus your attention.