I've had some issues with crashes when saving with this fortress. The current save I have does not crash if you load it and save, but it does reproducibly crash when retiring the fortress. I also had a crash happen when I tried to save normally some months after this current save, so something is going on. The crash seems to happen during "offloading units" phase, and does not produce any crash logs. The game just shuts down.

I had DFHack, but disabling it didn't prevent the crash on retiring the fortress from happening.

I have a bunch of mods, but they're cosmetic ones. The installed_mods folder is included, but note that I did not have all of the mods in there enabled on the uploaded save file. It's still possible one of them is somehow causing the crash, but I wouldn't know how to find that out.