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.
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