NHF – new heroes for Heroes V 3.1.

Basically, I looked into it and realized that it shouldn't work with this mod at all, because if NHF doesn't like something, it blocks it to prevent crashes and so on, and to display the error...

It's simpler: the parts of the NHF code that use functions from version 3.1 simply crash with an error: "such-and-such function not found," after which the entire code of one running thread fails. The main culprit is the mod's executable for faster AI turns: it requests something that it cannot process.