Hello MrT
All my usage of CCleaner has been with only Local disk (C:) ticked.
Using Tools-Drive Wiper- "Free Space Only" resulted in a successful wipe.
However, when "Wipe MFT Free Space" is ticked the wipe is cancelled before completion, I think cancellation starts when the MFT wipe is completed but before the Wipe Free Space starts.
Thanks for looking into it
Bushbaby