Multiplayer "Out of memory" error?

Hey, so, I have had some bugs with this game if you refer to my older post. However, I am pleased to say I got it to work.

Now I have ran into another problem. Whenever I try to play with my friends online I crash with an “Out of memory” error. This happens within 1 - 5 minutes of playing. In singleplayer however I do just fine. Anyone recommend a fix for this?

What version are you playing with – and can you post a screenshot of the error? Thanks!