So, as promised, I hunted down the line of code that was causing the P60 error. After I found it, acting on my immense coding experience and technological wizardry, I deleted it. What could go wrong?
Well, the AI pathfinding could break. That could go wrong.
So, I've been spending most of my time tweaking code and rewriting stuff. Not a lot of overt progress on the game, but I think maybe that there won't be annoying errors in the next iteration.