When I try to create a random map (using the map generator), the game crashes. This is definitely due to NCF, as it's the only mod I have installed. When I remove the mod from the game folder, the problem is resolved.
That's correct! It should work that way! To use the map generator, you need to play Might & Magic: Heroes V with NCF support!

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Неудачное планирование ведёт к неудаче ...
NCF - мод, добавляющий дополнительных существ в HeroesV 3.1