Not sure how far I am into it I am running P7N mod that way and get them from time to time, I do not think it has to do with the mods but maybe just a small bug, try going a different way into the system for a time and see
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Kill em all let God sort em out
I started a new Campaign 1. I just let the game run and it took a Floating Point Op and crashed sometime after 2497(the Last time I looked at it). I hadn't modded anything for Campaign 3 so I started a game of that and just let it run. It took a Floating Point Op in 2494 and crashed.
Uninstalled and reinstalled the game. Started a Campaign 1 and just let it run. It took a Floating Point Op in 2484 and crashed.
Looks like this is something I'm just going to have to live with...