Exported originals turn Black! I have an awful situation where my exported RAW (Nef) files from a special event have turned solid black. This happened while I was importing another job.

Question

A few days ago I got back late with my days work and went about importing it into Aperture as per usual. It was a big job so while the import was taking place I decided to export another job that was wanted the next morning. This client needed  origonal RAW files (NEF nikon) so I selected 'all' and chose 'export originals' from the File menu. These then went to my desktop, ready to be uploaded to a client FTP. So.. this is where the scary stuff started. The import went fine but the export was a disaster.  They appeared (on the desktop folder) with the preview as cover flow being the same as the import. When trying to open them they come up as completely black images. Ok, stay with me, this gets worse. Going back to the Aperture project, many of the correctly displaying previews have now turned black also, remaining previews when clicked on turn black. I've checked in the package contents of the library and have found the import master files correctly archived. The master files for the export though (the ones I'm desperately looking for) still view as the same image as the import. They do however have the file number of the exported files. I hope this makes sense. I really need to locate these missing original NEF files. Please help..

Answer 1

You can just try it with one image to start with, perhaps even one that youaren't having a problem with just to get the idea.
From the Aperture Manual:
To update JPEG previews for an image selection
In the Browser, select an image or group of images whose JPEG previews you want to update.
Control-click the image selection, then choose Update Previews from the shortcut menu.
You can also force the rebuilding of previews for an image selection.
To force the rebuilding of JPEG previews for an image selection
In the Browser, select an image or group of images whose JPEG previews you want to force Aperture to update.
Hold down the Option key while Control-clicking the image selection, then choose Generate Previews from the shortcut menu.
Link to manual: http://documentation.apple.com/en/aperture/usermanual/index.html#chapter=6%26sec tion=15%26tasks=true
I'm not certain that it'll help your problem, but it rang a bell with me as I had some images with black previews in an old library I was looking at last week and I used the force procedure to get the previews back how they should be.
EDIT: Added link to manual