5 Messages
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120 Points
Lightroom: Possible file error/corruption
I have now had several examples of NEF files downloaded and imported without problem a while ago now that I'm getting round to doing something with them, showing unexpected end-of-file errors or now getting the message 'there was an error working with the photo'. The NEFs appear OK unless that's just the preview file. I checked through the files briefly when I imported them and no warning signs showed and all preview images were fine. Now I am going through the files (and I have just reset the preference to write XMP files automatically) doing basic edits and files pop up with the warning triangles and appear corrupted for no apparent reason - even before I have started work on them as a couple more have shown up since this first happened. I am worried the whole catalogue is about to corrupt! Can anyone help please? The preview images look fine.
I am on PC, Windows 7, I import from the card into Lightroom. This issue only seems to have happened since upgrading to 4.1/4.2.
I have tried deleting the xmp file and reimporting the NEF and my husband has tried to import the file on his computer, but the error persists so it does appear to be properly corrupt!
I am on PC, Windows 7, I import from the card into Lightroom. This issue only seems to have happened since upgrading to 4.1/4.2.
I have tried deleting the xmp file and reimporting the NEF and my husband has tried to import the file on his computer, but the error persists so it does appear to be properly corrupt!
Responses
john_verne
Champion
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704 Messages
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8.5K Points
8 years ago
Most of the time, corruption is caused by a problem on the media, or the communication chain from the media to import. If you have the originals on the media still, try importing, but simplify down to copying it from the media to the desktop and import from there.
Alternatively, things are being corrupted on disk because of hardware problems. It depends on whether the corruption was detected on import or later.
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rob_cole_2221866
4.5K Messages
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76.3K Points
8 years ago
"What exactly went wrong when, and how do I keep it from happening in the future..."
If Lightroom "rendered previews from raw" OK after importing, then the corruption has occurred after import - probably a disk failure. To quote Jeff Schewe "there is zero chance Lightroom is at fault", however the truth is: the chance is greater than zero, although highly unlikely (there would need to be particularly insidious bug, since Lightroom should never be writing to those raw files, and probably isn't, *except* if you change capture time in the raws).
The problem is: it's not always clear when Lightroom is showing the jpeg preview, and when that has been replaced by a rendering of the raw data. It won't report any errors, if it hasn't yet tried to (needed to) render previews (and errors will not be in the form of a prompt, but a badge which you must look for / see).
In the future, I strongly recommend building previews during import, and visually inspecting all imported images *after* the previews have been built. If the images are corrupt after that, then it's not a camera/card/reader/cable/interface/driver... problem, but a storage integrity problem...
One way to get a report of all corrupt photos in the catalog is using TreeSyncPublisher v4.4.1+:
* Export in DNG format (full res, no preview, no lossy compression, and no fast-load data). This will force Lightroom to peruse the raw data, but not re-render it, and TreeSyncPublisher will detect and log corrupt files (ordinary built-in hard disk export will not detect corrupt files).
Another way to get report of corrupt photos: use the ordinary hard disk export but insert an export filter (post-process action), if you can find one. - any export filter will do (use same DNG format as specified above).
Note: force rendering all previews will (take a long time and) flag corrupt files via a badge on the thumbnail, but not generate a usable report, so you will still have to visually inspect each photo in the catalog.
UPDATE: related feature request:
http://feedback.photoshop.com/photosh...
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franco_ferretti
1 Message
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60 Points
8 years ago
0
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