Hey guys..
I'm thinking my install is corrupt. As my new mission files were getting the same error as before..
So asked on the forum and they were working for the guys who answered.
One of the guys rewrote the mission file for me, to make it more compact..
Two ways of doing this.. I can take a chance, complete the mission file, make the pbo and upload without testing. Or redownload arma ii from steam and then see how it goes from there..
Everything I have done before, with any major game breaking errors looks down to a corrupt installation..