Did you copy or view the NEF in Nikon software that is older than your camera? Is it just one image or all from a particular shoot?
I tried to import directly into Lightroom.
It just started on Saturday. I am using SD cards that I have used before with no issues.
I am wondering if I may have accidentally changed an import preference that is now giving me the error?
It have tried six different SD cards that I used this weekend.
I have done the same procedure many times without any issues. Take SD card directly from Nikon D800 to computer. Lightroom tries to import and I am not receiving the error.