Well, since I'm not getting any replies in the Misson Designers' Forum, I thought I might try posting it here:
I downloaded the S-class submarine from Sergbuto's page here:
http://web.telia.com/~u18230645/
After I installed it using JSGME, I decided to create a mission with it just to test if it works before I load up my career. When I validated the mission, nothing was wrong. However, when the mission loading bar was full, the screen went blank and an error message appeared, prompting to close SH3. I made sure that the mission folder had the same name as the .mis file.
What's wrong? Is the S-class known to have some flaws?
I also copied the media.cfg file from another mission folder into this folder but I can't seem to get it to work. I've also selected the exact version of the submarine I made player-controlled in the mission editor (in this case a 1940 VIIC).