EDIT: I have repeated this topic with more information in the General MakeMKV discussion forum. Please ignore.
I have a DVD which failed to open in MakeMKV using a USB COOLEAD drive. I was able to see the files in Windows Explorer. I tried to open it manually using 02:1-6 as the largest number of VOB files seemed to be for title 2. I got this error.
Drive BD-ROM MATSHITA BD-CMB UJ-120 1.03 has RPC protection that can not be bypassed. Change drive region or update drive firmware from http://tdb.rpc1.org. Errors likely to follow.
Error 'Scsi error - ILLEGAL REQUEST:MEDIA REGION CODE IS MISMATCHED TO LOGICAL UNIT REGION' occurred while reading '/VIDEO_TS/VTS_02_1.VOB' at offset '4096'
The DVD is marked as region 2. The drive has not been used to read DVDs from any other region.
Any thoughts?