Every once in a while one of my DNG files will not open in Lightroom. The message reading that the file may be damaged or corrupted. I try to open in Photoshop and I get the same message. I can not open the file no matter what I do. All of the other files from the same CF card open just file. Just one file out of the bunch. Does anyone know why this happens?
Have you tried using a different card reader? They sometimes cause this type of problem.
Definitely a hardware problem. Could be the camera card, or the card reader/USB cable/USB port or even the hard drive or memory. Definitely try importing using different hardware or even on an entirely different computer.