I got a big problem. Today I have finished diplomacy and resources and I begun to play a little, but on January the 1st game crash to desktop. Also the game is very slow, slower than it is in 1944 campaign. Next thing is that land doctrine tech tree is not working. I copied it from Fatherland mod and only I have changed is that I add one line which say "This tech tree is made by 'Fatherland mod' team". I also added this line in naval and air doctrines but they work. Thing is that when I add one or more techs to .inc files when I start the game it crashes. This thing also happens with Nightvision techs from secret weapons tech tree.