I've done coding for various servers before, and I think a total rewrite of the mission is what is needed. I'm willing to bet that a lot of things in the past were added to the code to try and fix other problems, and it actually broke something else in the process. That's the bad thing about coding: you add one thing and it breaks 10 other things. Another thing to consider is updates from B. I. and their implications on the mission file. Bohemia Interactive very well could have updated a small behind-the-scenes mechanic that silently broke an element of the game file. And, remember that the mission file is years old at this point so many updates have been applied to the game since this server's release. But hey, what do I know? I'm not a developer so I could be completely wrong