A while back it was posted that even though the .dll say you can have 50 civs, in actuality if you have more than 48 it MAFs. It has also been stated that if you use the BarbCiv option, that it's recommended not to exceed 24 Starting Civs.
Plus that many CIVs will slow the game down tremendously using RoM.
@Soiux, that's a bug in one of jooyo's .dll's for his mods. It's been posted and somewhat discussed in his RoM ModMod subforum thread.
JosEPh
not mine