It is puzzling that you could open some of the files, but not others.
Before I could open D800E RAW files in Photoshop CS5, I had to download and install the latest RAW plugin. If I remember correctly, it is Version 7.1. Once I did that, they opened with no problem in the CS5 RAW window.
From another perspective, which memory card were you using: Type, Capacity, Manufacturer, etc., and how were you storing the images on the card?
Check pages 434 -437 or your D800 manual for a list of approved memory cards, capacity, etc. Not all cards are approved for all capacities and all manufacturers.
I have never had to use RescuePro (counting my lucky stars!), but does it change the file type when it recovers a file?
Possible long shots, but perhaps worth looking into.
HBB in Phoenix, Arizona Nikonian Team Member
Photography is a journey with no conceivable destination.