Backup failed, on one machine

[ShardDragoon]

Have a new to myself machine specific issue. It's been a few months since I've used the entire backup feature as I like to do with certain titles from time to time but I seem to be unable to backup discs on one of my machines all of a sudden, it seems to work fine with other methods/applications but MakeMKV is simply giving a backup failed message with the three titles I've attempted so far (which all work fine using MakeMKV when carried up to my work machine).

Debug log started at Thu Jul 30 16:16:39 2015 , written by MakeMKV v1.9.5 win(x64-release)
Using 524544KB for read cache.
001005:0000 MakeMKV v1.9.5 win(x64-release) started
001004:0000 Debug logging enabled, log will be saved as C:\Users\HTPC/MakeMKV_log.txt
001003:0020 DEBUG: Code 0 at B_%m?;)ds/v|k6c,:c*8:29398760
005069:0080 Backup failed
005080:0204 Backup failed.
Application exited at Thu Jul 30 16:16:43 2015

I tried re-creating temp folder, changing folder locations, checking permissions, even changing the drive letter on the BD-RE from E: to D: to match my upstairs machine. Ran out of ideas.

[Woodstock]

The backup procedure does not give the same level of debugging that using the "Open/save to MKV" procedure. Please try using the Open method, to see what errors are reported.

If the disk rips on one machine and not the other, it COULD be drive related, OR software related.

[ShardDragoon]

Trying to copy all titles to mkv produced similar details which I'll paste first below, info produced the second set posted below, I don't see any additional helpful details sadly. I should probably mention just to be thorough that I am using makemkvcon64 on Windows 7 x64 in case there's somehow a difference between command line functions being used vs what the UI would pass along to makemkvcon.

Debug log started at Thu Jul 30 18:36:50 2015 , written by MakeMKV v1.9.5 win(x64-release)
Using 524544KB for read cache.
001005:0000 MakeMKV v1.9.5 win(x64-release) started
001004:0000 Debug logging enabled, log will be saved as C:\Users\HTPC/MakeMKV_log.txt
001003:0020 DEBUG: Code 0 at B_%m?;)ds/v|k6c,:c*8:29398760
005010:0000 Failed to open disc
Application exited at Thu Jul 30 18:36:53 2015

Debug log started at Thu Jul 30 18:40:07 2015 , written by MakeMKV v1.9.5 win(x64-release)
Using 524544KB for read cache.
001005:0000 MakeMKV v1.9.5 win(x64-release) started
001004:0000 Debug logging enabled, log will be saved as C:\Users\HTPC/MakeMKV_log.txt
001003:0020 DEBUG: Code 0 at B_%m?;)ds/v|k6c,:c*8:29398760
005010:0000 Failed to open disc
Application exited at Thu Jul 30 18:40:12 2015

[ShardDragoon]

Inexplicably it is failing only at the command line using makemkvcon64 backup disc:0 C:\Temp\ --decrypt or as suggested for mkv makemkvcon64 mkv disc:0 all C:\Temp\ and yet using the UI is completing successfully. If I didn't have the second machine available to me I'd think I had a syntax error. While at least I can still use the UI in MakeMKV for the second machine I'm definitely more of a command line/script person and am certainly confused. Debug log from successful UI use:

Debug log started at Thu Jul 30 19:48:20 2015 , written by MakeMKV v1.9.5 win(x64-release)
Using 524544KB for read cache.
001005:0000 MakeMKV v1.9.5 win(x64-release) started
001004:0000 Debug logging enabled, log will be saved as C:\Users\HTPC/MakeMKV_log.txt
003007:0000 Using direct disc access mode
DEBUG: Code 2147483648 at ^%89q5[n5PypdO,l:121265315
DAFD=PAAAADAAAAEABDQkEHwEBAQ==
DCE=3IuD+fGBIVpSO9fzr6BYrZewqywZkYbGdcdw7uSXY0nhukT9oAaS9JpVKlZ3bB7i1D1ZD/K3BhMshzz9BcCSfR081zdMlKbMStrcLf+/d4sOIEQGYOcfXtBqMp4su/jJ9dqd6V3s0MI1w/g6EhMspOtbWvK8B/sJkw==
DCE=Foh0A/4eJXvd6q8qLudB4RBOWDX9DAvDdQ5Xq9Hl7vVCD2fT4PxzjTQKlq7goxpapue0BLybjONhMQ0uVppYYQnZ5Bo+9Zs08m1ZSnQ4iVvYYnyRMhtPxXxprB8pWjcqYs18d3LgYopam8I4mGzZlIcQISx2pmHdXg==
005085:0000 Loaded content hash table, will verify integrity of M2TS files.
DISCID=EFE097FB475838454A7808EAF567D5CC41FA89D8
003307:0000 File 00001.mpls was added as title #0
003025:0000 Title #00002.mpls has length of 65 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00003.mpls has length of 50 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003307:0000 File 01000.mpls was added as title #1
003307:0000 File 01001.mpls was added as title #2
003025:0000 Title #00000.m2ts has length of 13 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00105.m2ts has length of 40 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00106.m2ts has length of 25 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00003.m2ts has length of 25 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00006.m2ts has length of 5 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00007.m2ts has length of 1 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00010.m2ts has length of 5 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00011.m2ts has length of 1 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00012.m2ts has length of 1 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00013.m2ts has length of 1 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00014.m2ts has length of 12 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003307:0000 File 00015.m2ts was added as title #3
003025:0000 Title #00016.m2ts has length of 56 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00017.m2ts has length of 92 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00018.m2ts has length of 110 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00072.m2ts has length of 5 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00073.m2ts has length of 5 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00074.m2ts has length of 5 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00079.m2ts has length of 5 seconds which is less than minimum title length of 120 seconds and was therefore skipped
003025:0000 Title #00103.m2ts has length of 1 seconds which is less than minimum title length of 120 seconds and was therefore skipped
005011:0000 Operation successfully completed
005014:0000 Saving 1 titles into directory C:/Video/South_Park_Bigger,_Longer_And_Uncut
005005:0080 1 titles saved
005036:0104 Copy complete. 1 titles saved.
005014:0000 Saving 1 titles into directory C:/Video/South_Park_Bigger,_Longer_And_Uncut
004001:0000 Forced subtitles track #5 turned out to be empty and was removed from output file
004001:0000 Forced subtitles track #7 turned out to be empty and was removed from output file
005005:0080 1 titles saved
005036:0104 Copy complete. 1 titles saved.
Application exited at Thu Jul 30 20:20:48 2015