Okay... this wasn't the answer to the same problem I'm having. In my case - I was COPYING a DVD that I had made in TOAST from .avi clips a few months back. I had burnt several copies from that disc for friends.
The -108 - out of memory - same prob. Using 7.0.2.
Making a disc image from Toast - CAUSES THE SAME problem - so that rules out the burner or firmware issue. Never had this prob before and have been using the SAME branded discs - TDK and same burner for over 8 months now. The burner was switched OFF and UNPLUGED from the computer. Have been using the same external drive for years - only the burner was upgraded.
The DVD that was made in TOAST plays fine - without problems - and in several different players (my friends). So I am semi-ruling out the TS Files suggesion.
Will try out 7.1 and see if that resolves the issue.
EDIT: Have tried in Toast 7.1 - SAME PROBLEM !
Will create an image in another program and see how it goes.