Always a difficult one.
I think my approach would be to check if the production renders to a file format. If it does and all is OK then the problem lies in the create disc side.
If so I would try without any menus etc - ie as close to a simple file as possible. If that works, well it points to the menu side etc.
If it doesn't work then I'm not sure what next.
If the file production fails then I think you are into a process of elimination.
I think I would pack the project, reopen, save a copy, open the copy and then start eliminating. If you have multiple tracks, maybe start by deleting one track at a time, using a quick and dirty approach, and see if the problem goes.
Altenatively, use the more scientific method of deleting the front (or back) half of the project, testing, if the problem goes it was in the deleted half, if not it's in the remaining half. Delete half again, repeat ad infinitum.
If the project is very large, maybe try working with smaller sub-projects and combining them once produced and then burning to disc?
Someone else may have other methods.
Cheers
Adrian
Life is really simple, but we insist on making it complicated. (see below)
Confucius
AMD Phenom IIX6 1055T, win10, 5 internal drives, 7 usb drives, struggling power supply.