Some BD/DVD ISOs fail to open

[Tyrindor]

MakeMKV v1.8.9 win(x64-release) started
Current operation: Scanning CD-ROM devices
Current action: Scanning CD-ROM devices
Current operation: Opening DVD disc
Using direct disc access mode
Current action: Processing title sets
Title #1 was added (8 cell(s), 0:55:50)
0 Titles Skipped. They were shorter than minLength 120.
Current action: Decrypting data
Operation successfully completed
Current operation: Saving all titles to MKV files
Saving 1 titles into directory K:\batch_temp
Current action: Analyzing seamless segments
Failed to save title 0 to file K:\batch_temp/title00.mkv
0 titles saved, 1 failed
Copy complete. 0 titles saved, 1 failed.
Conversion Process Completed In: 00:00:10.1536073

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There's no errors other than failed to open. So far I got 17 DVD ISOs and 1 BD ISO (out of a couple hundred) that have this problem. MakeMKV simply says "Failed to load", however I can mount them and play them in PowerDVD no problem.

Any ideas on how to fix these? I even tried running them through DVDFab, which gave me no problems, however DVDFab's MKVs have subtitle issues on my popcorn hour so it's not a full solution.

[Tyrindor]

It appears that even though they go through DVDFab "successfully" there we're missing scenes. Looks like corruption that MakeMKV detects, but DVDFab doesn't.

[Woodstock]

As a general rule, you should enable "debug logging", which will show more about the errors MakeMKV sees. FAQ link in my signature explains how.