So I updated my mkIV to 4-1/00 recently after joining this site and doing some reading - orsm.

I currently have map disc 12 (latest is 16 I believe) australia and this works fine on my existing system, tonight my mate brings over his OEM factory non copied disc 13 and my system wont recognise the disc

Q: is there something I need to do to get my system to recognise the new map disc at all?

Thanks

Dubs