nvm dont worry! I found a simular post on this page, so I can follow their steps towards a solution.I've seen this before, but I'm not sure if it was on my computer, or someone else's.
Any Ideas on how to tackle this one haha?. It doesn't appear on vanilla campaigns, only inside my mod.
I am running on Windows 7, 64 bit.
Thankyou in advance!
Solution (thanks to Gigantus):