Lightroom: "The file appears to be damaged" - Merge To Panorama with large Canon 5Ds files.

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  • Problem
  • Updated 6 months ago
  • Solved
  • (Edited)
I am attempting to create high resolution HDR Tilt-Shift Panoramas with Lightroom's Merge To HDR and Merge To Panorama functions. I have taken multiple images with a tilt-shift lens on a Canon 5Ds. Each finished photograph would be composed from 15 or 21 separate images. I take 5 or 7 photographs, 1 stop apart, from the center position then 5 or 7 from the shift right position and the same from the shift left position. Each set of 5 or 7 is merged to hdr to create one dng file. This process works fine. The resulting 3 hdr images are then merged to panorama which completes successfully. When I switch to the develop module or open the panorama file in camera raw I get a message stating "The file appears to be damaged". I have reproduced this error on different computers. My Lightroom version is the 2015.4 Release and Camera Raw is v9.4. Both computers are running Windows 10. It seems to me that Lightroom is struggling with the large file sizes coming from the 5Ds. Has anyone else experience this issue.
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Posted 2 years ago

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Photo of Rikk Flohr

Rikk Flohr, Official Rep

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Official Response
This should now be fixed as of the CC2015.6/6.6 update released today. You can find more details here:

However, to correct the issue, the images have to be merged again. The bug was with how the resulting DNG was created so HDR and pano DNGs created before the fix, will still show the error.