I use makemkv version 1.8.8 and I now got this messages..
It's an iso file an normaly I don't have any problems with these.
I have tried two iso files today (one of them has been through mkv before) with no luck.
failed to open disc
Re: failed to open disc
Not much help can be given without a debug log to show what is going on.
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