Every 10th photo from my Canon 5D Mark IV won't import

[jtaylor333]

I just got back from a trip and had 4600 photos.

I copied them onto my SSD and then imported into Lr Classic CC (v7.5, Camera Raw v10.5)

8 of the photos would not import "The files cannot be opened by Lightroom" (RAW .CR2 files)

The even weirder part is that the 8 photos that wouldn't import are exactly 10 photos apart (9513, 9523, 9533 ……. 9583)

I copied them back from my PC to a memory card and put it in my camera and the camera reads them perfectly (on its screen).

This also happened on my previous trip with this camera.  All programs are updated.

Help appreciated!!

[johnrellis]

If you upload one of those photos to Dropbox or similar and post the sharing link here, we can see if it imports into our LR configurations, and if it doesn't, what might be going wrong.

[jtaylor333]

Many thanks

The link is Dropbox - Lr Files - Simplify your life

[johnrellis]

That raw image in that file is definitely corrupted.  LR produces this error when trying to import it:

The Rawdigger tool produces this error:

And Exiftool produces this error when you try to change an EXIF field:

I copied them back from my PC to a memory card and put it in my camera and the camera reads them perfectly (on its screen).

The JPEG preview in the file appears to be undamaged, and most likely that is what the camera is displaying. Both Mac Finder and Exiftool are able to read the JPEG preview:

It is curious that the corrupted photos are numbered 10 apart. If there's a hardware failure somewhere along the path (bad blocks on the SD card, bad block in RAM memory, bad block on SSD, etc.) it could have been that every 10th photo happened to trip over it.  The SD card is the first thing to be suspicious of.