If you're meaning version 1.7.71 (a special version for the Mac), it's obsolete, and will not work on BD if you've inserted the recently-released Total Recall BD.
Update to 1.7.10, and try again.
Fatal error from successful disc backup and from disc.
Re: Fatal error from successful disc backup and from disc.
MakeMKV Frequently Asked Questions
FAQ about BETA and PERMANENT keys.
How to aid in finding the answer to your problem: Activating Debug Logging
FAQ about BETA and PERMANENT keys.
How to aid in finding the answer to your problem: Activating Debug Logging
Re: Fatal error from successful disc backup and from disc.
Still not working on windows with version 1.7.10. I'm completely new, but have started ripping my collection and been through quite a few discs. This is the only one so far that hasn't worked. At this point would another copy of error logs from a different user be helpful?