Unexpected end of file error notification
Today I encountered, after several trouble free years with Lightroom, the "unexpected end of file" error. I moved a batch of Nikon .NEF files, that were all shot on the same day, directly from the SD card to a folder on my Mac Desktop, and from there imported to Lightroom. When trying to Develop in Lightroom all the files from that day prompted the message "unexpected end of file" error. The same thing happened when I tried the same operation on another Mac running Lightroom. The corrupted images can be viewed and zoomed and look perfect in the camera's display screen, but cannot be processed using the camera's NEF (RAW) processing function or other editing functions. In Mac Finder the files show a range of sizes from 2MB to 12MB and show a thin or wider black edge to the image.
However, other files shot prior to the "problem" day using the same camera and SD card can be transferred without issue, and new .NEF shots I have taken today using the same camera and the same SD card have transferred and performed normally in Lightroom.
I've tried the "Fix" download but it doesn't work for me and, fair enough, that's not surprising as my camera is not among the models listed - Nikon D5100. I'm going to change SD card and do a periodic check via the in-camera RAW processing. I haven't provided any other "relevant details" as I don't know what details would be relevant in this case.