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And another. Aliens finished and ejected, Alien 3 in.

DEBUG: Code 0 at B{3RiV; wF-#edzu=<OA:29394735
001003:0020 DEBUG: Code 0 at snfUJkYi%8M*dHy]ghss:121265315
001002:0020 LIBMKV_TRACE: UDF mount: disc not properly formatted(bad VDS)
Application exited at Thu Mar 07 16:34:27 2013

Got it. I had finished ripping Alien, pressed eject, and inserted Aliens. - DEBUG: Code 0 at B{3RiV; wF-#edzu=<OA:29394735 001003:0020 DEBUG: Code 0 at snfUJkYi%8M*dHy]ghss:121265315 001002:0020 LIBMKV_TRACE: UDF mount: disc not properly formatted(bad VDS) Application exited at Thu Mar 07 14:43:22 2...

Will do my best to get you a log.

After ripping one blu-ray, pressing eject, and inserting another, I occasionally get the message LIBMKV_TRACE: UDF mount: disc not properly formatted(bad VDS) in v. 1.8.0 x64. Closing and re-opening the program resolves the issue, and I can then click the picture of the drive to proceed with opening...

Thanks Mike.

I changed the Profile to Default and it worked.

Excuse the search friendly title, I thought I'd make it so others might find this in case they're having the same issue. I'm steadily backing up my blu-ray collection, but am also accumulating a pile of a few discs that just won't rip. Here's a screen shot of what happens. I left this one overnight ...