Seems to work - that deleting CIVIC_NOTHING line. I had removed some other civs as well, as i didn't need them and as there were too many of them, they were causing some other problems.
The question I've got now is - are those old civilizations known from Civilization IV vanilla, Beyond the Sword and even from Rise of Mankind - A New Dawn, able to emerge later in the game or is this ModPack replacing the old ones completely?
I know I can start a game (especially when customizing) with any civilizations I want (Netherlands, Roman, Spain or Vikings) but if I fon't choose them as starting civilization, is it possible they would emerge while playing a game or not? Or is it just those from this huge Pack able to do so only?
I haven't encounter any of "old" civilizations turning up in the game so far, that's why I'm asking (though I did only 220 turns so far).
To explain it a bit further - I had started the game with 21 civs, all known from A New Dawn mod, and some new ones have emerged since then (doesn't matter if by breaking of another civilization or transforming from a barbarian camp, all of them were those installed from this modpack only).