I think Han Solo might be right about the Memory issue. I also am having intermittent CTDs when loading campaigns...
1. Standard GWX 3.0 (Starting Position: Wilhelmshaven) - No problem.
2. Standard GWX 3.0 (Starting Position: Kiel) - CTD at end of loading
3. Med Mod for GWX 3.0 (Much smaller than GWX campaign) - CTD at end of loading
4. Single Missions, GWX 3.0 - No problem.
I think it might have something to do with the sophisitication of the graphics in the near vicintity rather than total file size of the missions/campaign. My Med Mod for GWX is much smaller than the GWX standard campaign yet I can launch from Wilhelmshaven in Standard GWX 3.0 with no problem. Launching near Salamis in my mod crashes every time.
I will try an experiment tonight and try starting the same campaign but at sea and see if that makes a difference.