www.makemkv.com

This set of discs is now being ripped successfully.

Thanks for the reply. I'm working through the discs one at a time.

Could it be an issue with my drive?

Drive Information
OS device name: /dev/sr0
Current profile: BD-ROM
Manufacturer: HL-DT-ST
Product: BD-RE BU40N
Revision: 1.03
Serial number: ...
Firmware date: 2118-10-24 19:34
Bus encryption ...

Submitted MKB20_v61_Game_Of_Thrones_Season_1_Disc_2_6C35.tgz

I hope I don't need to submit the dump file for every disk in the collection!!

Edit:
I did have to do them all! Following files submitted:

MKB20_v61_Game_Of_Thrones_Season_1_Disc_1_EE7D.tgz
MKB20_v61_Game_Of_Thrones_Season_1_Disc_2 ...

I have also submitted

MKB20_v77_Alien-_Romulus_7590.tgz

I think it is different to the one already submitted.