Could you please provide more details about the error? There's a mod that replaces the Orc model with the one shown in the screenshot, and this bug exists in that mod. It would be helpful to fix this mod.
Here's the mod (apologies, I don't know the author).
This is my mod; what's wrong with it?!
Actually, this mod has been included in the NHF for a long time, and the version isn't from 03.05.2009!

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