I have just updated premier with Adobe Application Manager today, checked 'updates' afterwards and confirmed all is up to date.
But now when I run the app I get a message entitled 'Missing Renderer' and it says the last time the project was open mercury was available that the mercury system is not available now and software only will be used- or words to that effect
It always was available. I re-checked the supported cards text file and my card is there. Geforce GTX 260
In about box, my version is 6.0.3 (001 MC264587)
I am on windows 8 ultimate
Maybe try deleting (or moving) the cuda_supported_cards.txt file
and then re-launching Premiere.
C:\Program Files\Adobe\Adobe Premiere Pro CS6\cuda_supported_cards.txt
Updates to PP replace that text file with a new version, so every time you update you need to redo the hack.
Thanks for your replies.
Working now. It appears that after the upgrade, the entire Adobe directory on drive C became read only. I reset this and all works fine again
No idea why, a strange but true story!