Thanks for that clarification.
When shooting with the 1Ds Mk3, I always use ACR via Bridge for processing. I can process any number of files without a hitch.
However, when shooting with the Hasselblad, I only use ACR for its Heal tool, and that's where the problems arise. If I clean the same spot on, say, half a dozen images and try to save them out I get the "There is not enough memory error" when I know there is!
ACR's Heal tool is one of its killer apps in my view. If it could handle large files in quantity, I'd be very happy!