Hi
When I started out editing a few years ago I had a lot of frustrating problems like that. Never really knew what the problem was.
I know that some Windoes system because of some setting or way of formatting you’re hard drive, it only exports files up to 2GB.
Whats the max file size that it exports? I’m usinf Avid MC 2.8 but not sure if there was a setting in an older version that might restrict to file size.
Good luck and I would like to know the solution