In the mercenary expansion I was on the fight with the hive queen and i just killed her so i saved. the suddenly the game randomly had an error and closed the game. i booted up the game again and tried to load my save point but after its done loading the same error comes up and closes my game. Is there anyway to stop this error? plz help

Have you tried playing the level from the begining, or from an earlier save? Your saved game may have an error in it.

yeah I get the same error every time I get there

I reinstalled it and went back and its working fine now. just let this be an example that you should always keep a backup save