6056.820 Error MainLoop.cpp:1429: Exception at tick 1772721: The mod Combat Robot Overhaul (2.1.15) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event CombatRobotsOverhaul::on_nth_tick(60)
real number expected got nan.
stack traceback:
[C]: in function 'get_closest'
CombatRobotsOverhaul/scripts/destroyergroup.lua:43: in function 'update'
CombatRobotsOverhaul/control.lua:275: in function <CombatRobotsOverhaul/control.lua:268>

dont know how to reproduce this, just occures randomly
list of mods is in my previous post

https://drive.google.com/file/d/1G881v_H56pCdsRYDJ2A7YzmmkKDKHi98/view?usp=sharing - save, a few seconds before the crash

Thanks for the save. As said in the other thread, it looks like the mod data storage has been borked due a fault in the migration code from 2.1.14 to 2.1.15. The data storage shows me several combat groups with no members, hence why they don't have a shared position which leds to the errror. To fix it I reccomend you remove the mod, load and save the world and then re-enable it. I'm sorry for the inconvience.