While I've been able to rip nearly all my regular blu-ray discs without issues, a majority of the UHD-discs give me trouble.
Some of those problems are apparently "read errors" and after attempting to clean the discs, they may fail at a different offset/location..
Considering the long time it takes to rip these discs, couldn't the program enable the user to eject the disc for the user to clean it, then continue from where it left off rather than just bail out completely?