"Upon further review" it appears the problem lies with the SanDisk cards. I have two of them a 64 meg and a new ultra fast 256. I did get the 64 meg card to work on the very first pictures I made...all jpegs. Now, no way. The Nikon View did read and download an NEF I had on a small (16 meg) card from Lexar. I hope I can figure this out before I have to take the D100 back.