Issue:
Lightroom claims a DNG file is damaged yet it can be processed in other applications.
Provide Lightroom Classic version:
11.3 Release Camera Raw 14.3
Build [202204051513-7a25c809]
Provide OS and version:
macOS Monterey
Version 12.3.1
iMac (Retina 5K, 27-inch, 2019)
Processor 3.6 GHz 8-Core Intel Core i9
Memory 64 GB 2667 MHz DDR4
Startup Disk Macintosh HD
Graphics Radeon Pro 575X 4 GB
Issue:
When attempting to edit a handful of DNG images in my library Lightroom claims:
"The file appears to be unsupported or damaged."
That message appears in a popover on an imbedded preview.
Of interest:
- Mac finder can process the image.
- Mac Preview.app can process the image.
- Affinity Photo can process the image.
- Exiftool can read the image metadata
My workaround is to convert the image to another format using Finder or Preview or Affinity Photo.
Also of interest: Every damaged DNG was created by a Leica camera and subsequently modified by an older version of Lightroom Classic, specifically Adobe Photoshop Lightroom Classic 9.0 (Macintosh). Exif data says:
History Action : saved
History Instance ID : xmp.iid:375df6ee-7fb1-479c-8be6-e122486b8583
History When : 2019:11:30 22:16:20-08:00
History Software Agent : Adobe Photoshop Lightroom Classic 9.0 (Macintosh)
History Changed : /metadata
I can not reproduce damaged files upon demand. I uploaded an example of a damaged image. Out of approximately 6,000 DMG images in my library less than 20 are damaged.
Expected result:
Lightroom Classic should be able to edit the image. At a minimum I should be given the option to attempt to render the image regardless of the report of damage.
Actual result:
Lightroom Classic can not edit the image. I must first convert the image to a different format using some other application