Creatures Caves

All of my other worlds work fine, expect this certain one. It spits out weird error I've never seen like:

Error in: World::Load
CRA0010: range check failed

Error in: WinMain
AHE0008: Attempt to access garbaged handle

The bad part is this world was home to my prized GoM clan that had just reached generation 25 yesterday. The weird part is that it worked this morning, but now it isn't. The world is pretty much dead at this point, and I'm just glad I have some exported females from this world. I'm just wondering what might have caused this sort of error, so hopefully I can avoid it in their next world.

Some extra details that might help, my computer is Windows 7, I have the remastered patch installed, and the only weird things I installed on this world were some cos files meant for GoMs. The cos files have been installed for a week now though and it hasn't crashed until now. It might be a bad breed though. I can't remember if this is the install that has the crashing Pixies or if that was the last one. Also Crashing Pixies sounds like a band name.