Okay, so tesco maps don't seem to work with Devnull for some reason.
I'm getting error Messages too and I'm pretty sure it's not my copy of Devnull (just completed a turn of Puke's Mail Order Monsters and it ran fine).
So Parabolize, want to go with a regular randomly generated map?
Geo, if so, I'd like an opportunity to slightly tweak my empire file before the game starts.