To add to the confusion kapuhy, the game is still full of sim, zon, val and other controller files which aren't last saved by me. We still have stock files on some units and equipment, various files from different mods ect...Still, we can pass our rendering test with them?!
Until I have discovered this, the game was full of "subchasers" but at the moment when I resaved controller files of playable submarines, the CTDs dropped by something like 80%.
There is also "something" in Kiel harbor which can "squeeze" out hidden problems, and that's why it is important part of the rendering test...