When campaign mission is completed, file called exit.sqs is executed. This is used for example in Resistance campaign to transfer weapons and soldier information to the next mission (saveVar and saveStatus).

Exit.sqs file is called and executed automatically, you do not have to exec it yourself.

If this file is very long, it is executed… but cant get very far before mission ends so make sure you don't add very complex and absolutely NO ~ or @ commands as they simply wont get executed there.