Hi, thanks very much for the reply! I tried just picking up a roboport on grass, and then placing it down again, and nothing. I tried placing a new roboport on a 20x20 square pad of concrete, and still nothing.
Is there anything else I can do to give a clue as to what's happening? I notice the roboports have Better Bots Technologies written under their name in the info window - is it possible they're not called roboports anymore, and your mod only applies to items called roboports, or something along those lines?