P: DNG file is damaged yet it can be processed in other applications

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Explorer ,
Apr 19, 2022 Apr 19, 2022

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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

Bug Acknowledged
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macOS , Windows

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correct answers 1 Correct answer

Adobe Employee , May 16, 2022 May 16, 2022
Updating Bug Status
Status Acknowledged

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59 Comments
Adobe Community Professional ,
Apr 25, 2022 Apr 25, 2022

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Could you please share a DNG that produces the error, via Dropbox or the like, so other users can check on their system.

Regards, Denis: iMac mid-2015, 5K 27”, GPU 2GB, Ram 24GB, HDD 3TB, macOS 11.6.5,; LrC 11.3.1, Lr 5.3, Ps 23.3.2-ACR 14.3,; Camera OM-D E-M1.

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Community Beginner ,
Apr 28, 2022 Apr 28, 2022

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So I have treid shooting uncompressed DNG + jpeg and just uncompressed DNG only.  Out iof every batch of 30 or 40 test files there is always 4 or 5 which cannot be brought into lightroom.  I have an error in the import preview window saying the thumb nail cannot and or the error message below.

 

Screenshot 2022-04-24 at 21.36.26.png

I have only had these issues since updating LR to the latest version

 

How can I roll back LR to the previous version?

 

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Adobe Community Professional ,
Apr 28, 2022 Apr 28, 2022

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You can use the Creative Cloud to perform the uninstall and the re-install, at the far right of the LrC app in the list of installed apps click on the three dots and you can select previous versions.

 

Regards, Denis: iMac mid-2015, 5K 27”, GPU 2GB, Ram 24GB, HDD 3TB, macOS 11.6.5,; LrC 11.3.1, Lr 5.3, Ps 23.3.2-ACR 14.3,; Camera OM-D E-M1.

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New Here ,
May 05, 2022 May 05, 2022

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I shoot with a Leica M (Typ 262).  On my last couple of imports of the Leica's native DNG files to Lightroom Classic (11.3.1) I have run into several files not being loaded.  My standard procedire is to first move the files from the SD card to disk with Bridge (14.3) and then Import from the computer disk.  In recent instances I will have one or more DNG files displayed with a "Preview unavailable for this file" message instead of the preview.  These files will not be imported into the catalog, wher I get an Iport Results dialog stating "Some import functions were not performed" along with a window stating "The files appear to be unsupported or damaged" along with a list of the affected files. Interestingly, this seems to happen to only the first few files in the import, as well as the very last file in the series.

Has anyone else run into this problem?  Is there a solution?  I can see image previews in Windows' files manager, but Photoshop will not open them as being "not the right kind of document."  

 

I run the Adobe software on  Dell XPS 15 9550; Windows 10 Home, version 21H2, OS Build 19044.1645

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LEGEND ,
May 05, 2022 May 05, 2022

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Could be the files are damaged, like the message says. Can you upload one such photo to Dropbox or similar and provide us with the link?

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LEGEND ,
May 08, 2022 May 08, 2022

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There have been a number of recent reports of problems importing Leica DNGs, and it's not clear whether this a bug in LR or simply coincidence that a number of Leica users have bad hardware corrupting some of their files. So dj_paige's suggestion would help identify whether there might be a bug.

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Community Beginner ,
May 11, 2022 May 11, 2022

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An odd thing is happening, we have several 24TB NAS boxes, where we store client DNGs and all has been fine for years.

We recently had cause to go back to 2016 for a client to retrieve some images but found that 10 or so files in the catalogue were 'unreadable' they had the correct file size etc just cant be opened. LR showed a small thumbnail in the catalogue only.

Same with Bridge or trying to open in PS, 'cannot read this file type or unsupported file type'
I was worried so as a last resort I set up a new catalogue in CaptureOne and it built all the previews no problem reported no errors and I could export all files etc..

 

Why would only LR not show these 'unreadable files? I tried making new catalogues and switching GPU on and off on our M1 macs, no joy.

 

The files that cant be read are only from one camera (a Leica M240) my other cameras are all fine from any time, but as I say its only Adobe, with this issue.

Any suggestions?





https://www.piranhaphotography.com>Douglas Fry<br />https://www.piranhaphotography.com

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LEGEND ,
May 11, 2022 May 11, 2022

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The files have been corrupted. More than likely, this is a hard disk malfunction on your NAS. You need to restore the files from their backups.


What happens in other software is irrelevant, by Adobe's rules these files are corrupted and unusable.

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Community Beginner ,
May 11, 2022 May 11, 2022

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Thanks for the reply, the corruption shows on all NAS's suddenly and on all the same files, so unlikely to be a disk malfunction. but if I browse images in C1Pro and choose to edit in photoshop, photoshop opens the image correctly at full resoltution. Its weird that one small element of the DNG file goes rogue for Adobe but CaptureOne ignores it and opens all images fine.

 

We have another backup NAS in a separate office and that shows the same issues too on the same file numbers.

 

If I export the file as a DNG from C1Pro and open it in Photoshop etc, its fine.

 

I'll keep an eye on it and see if the number of corruptions increase, otherwise I'll wait till I need files and work on them in C1Pro instead





https://www.piranhaphotography.com>Douglas Fry<br />https://www.piranhaphotography.com

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LEGEND ,
May 11, 2022 May 11, 2022

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Thanks for the reply, the corruption shows on all NAS's suddenly and on all the same files, so unlikely to be a disk malfunction.


Network malfunction?

 

again, what happens with C1Pro is irrelevant

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Community Beginner ,
May 11, 2022 May 11, 2022

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Cant be a network malfunction in two different sites and different networks. Disk scans also come up clean,  no errors
What happens with C1Pro is very relevant, SilkyPix is also giving a green light on all files (as a test), this implies the files are fine and LR is playing up.  If it comes to it I'll just cancel LR and move to C1Pro, I am trying to find out why LR finds the same files corrupt on 3 NAS's on two networks

We have moved to all M1 Macs both Max and Pro so could be that, we had MacPro's over lockdown (the last time we looked extensively at older files and all were fine)





https://www.piranhaphotography.com>Douglas Fry<br />https://www.piranhaphotography.com

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LEGEND ,
May 11, 2022 May 11, 2022

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There have been a number of other reports recently about problems with DNGs from Leicas. It could very well be hardware corruption, or it could be a problem in LR.  The only way to make progress on the latter hypothesis is for people experiencing the problem to share some sample files, and we can see if the problem occurs on other LR configurations and if the file contents are corrupted.  Without sample files, Adobe isn't going to pay attention.  So upload a couple sample files to Dropbox, Google Drive, or similar and post the sharing link here.

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Community Beginner ,
May 12, 2022 May 12, 2022

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'There have been a number of other reports recently about problems with DNGs from Leicas.' - If you have a link that would be great, my other Leica kit, M10's, SL, SL2-S etc are all fine. What is odd is that it has just started happening, maybe its an update to LR?

 

I will post a 'corrupt' image here when I get back to the office





https://www.piranhaphotography.com>Douglas Fry<br />https://www.piranhaphotography.com

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Community Beginner ,
May 13, 2022 May 13, 2022

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https://www.dropbox.com/scl/fo/gpgoevxejs371w56oa3db/h?dl=0&rlkey=kgj187jch1pucoaweie0w7liq 

 

There are a bunch of files here from 2016, sent from the file server in Oxford, and I tried to open them in London in Bridge and Lightroom, no joy

 

'Could not complete your request because Photoshop does not recognize this type of file.'

Of course SilkyPix and C1Pro can read them fine.

 

 





https://www.piranhaphotography.com>Douglas Fry<br />https://www.piranhaphotography.com

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LEGEND ,
May 13, 2022 May 13, 2022

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My Lightroom Classic 11.3.1 (Windows 11) tells me:

"File appears to be unsupported or damaged"

 

So this doesn't really resolve the issue brought up by @johnrellis is the file truly damaged, or does LrC have problems reading DNGs from your Leica camera.

 

I wonder if trying to open this in Lightroom 6 would produce a different answer.

 

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Community Beginner ,
May 13, 2022 May 13, 2022

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Thanks for trying anyway...

Points to note

 

1. It has only just started happening, our MacPros over Covid etc all opened all files since year 2000 fine, we did a large project over lockdown and had cause to go back over files.

 

2. Only shows this error ONLY with Adobe products, I tried last night some open source RAW convertors and they all work fine on any files.

3. Its only on Leica M240 files not M10 or SL2-S etc

 

So, maybe its an update to Adobe, or because its M1 processors on Mac or some other random reason.





https://www.piranhaphotography.com>Douglas Fry<br />https://www.piranhaphotography.com

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LEGEND ,
May 13, 2022 May 13, 2022

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1. It has only just started happening, our MacPros over Covid etc all opened all files since year 2000 fine, we did a large project over lockdown and had cause to go back over files.

 

It is possible that something has changed within Adobe code that handles these DNGs, causing this new appearance of apparent corruption. I consider this unlikely, but can't rule it out. If possible, someone (maybe even you @Douglas Fry ) might want to install LR 6 temporarily and see if the DNGs work there. You can download LR 6 at https://prodesigntools.com/adobe-lightroom-6-cc-direct-download-links.html

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Community Beginner ,
May 13, 2022 May 13, 2022

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OK thanks will try, LR6 wont install on OS12.3.1 but a colleague still has it on his older mac and I have sent the dropbox link to him





https://www.piranhaphotography.com>Douglas Fry<br />https://www.piranhaphotography.com

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LEGEND ,
May 13, 2022 May 13, 2022

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quote

OK thanks will try, LR6 wont install on OS12.3.1 but a colleague still has it on his older mac and I have sent the dropbox link to him


By @Douglas Fry

 

 

Good thinking!

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LEGEND ,
May 13, 2022 May 13, 2022

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Those sample DNGs import just fine into LR 11.2, 8.4.1, and 6.14, and they can be edited in Develop after import.   

 

But LR 11.3 and 11.3.1 / Mac OS 12.3.1 produce this error:

 

johnrellis_0-1652458310456.png

 

I think that's pretty strong evidence that a bug was introduced in LR 11.3 / Camera Raw for handling these DNGs.

 

Luckily, there's a straightforward workaround: roll back to LR 11.2.

 

Recent reports of problems with Leica DNGs:

https://community.adobe.com/t5/camera-raw-discussions/individual-dng-file-not-opening-in-camera-raw-...

https://community.adobe.com/t5/lightroom-classic-discussions/problems-loading-leica-m-dng-files-to-l...

https://community.adobe.com/t5/lightroom-classic-discussions/some-dng-files-are-nt-compatible-anymor...

https://community.adobe.com/t5/lightroom-classic-discussions/lightroom-claims-a-dng-file-is-damaged-... 

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LEGEND ,
May 13, 2022 May 13, 2022

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@Rikk Flohr: Photography, please move into Bugs -- my previous post demonstrates that 11.3 introduced a problem handling DNGs from a Leica M (type 240), and there are 4 other posts of problems with Lecia DNGs subsequent to 11.3's release.

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Adobe Employee ,
May 13, 2022 May 13, 2022

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@johnrellis  Do we know if this is limited to Lightroom Classic or if Camera Raw and Lightroom Desktop are also affected?

It makes a difference where a bug would filed. 

Rikk Flohr - Customer Advocacy: Adobe Photography Products

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LEGEND ,
May 13, 2022 May 13, 2022

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I did a quick test, and CR 14.1 and 14.2 open those DNGs but 14.3 does not.

 

I just noticed that the first post I linked to above also has sample DNGs, and they open in 14.2 but not 14.3

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LEGEND ,
May 13, 2022 May 13, 2022

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Someone else finally uploaded sample DNGs from a Leica, and the problem is definitely a bug in LR / Camera Raw:

https://community.adobe.com/t5/lightroom-classic-discussions/unreadable-files-on-nas/m-p/12941302#M2... 

 

As a workaround, roll back to LR 11.2.

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LEGEND ,
May 13, 2022 May 13, 2022

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Someone else finally uploaded sample DNGs from a Leica, and the problem is definitely a bug in LR / Camera Raw:

https://community.adobe.com/t5/lightroom-classic-discussions/unreadable-files-on-nas/m-p/12941302#M2... 

 

As a workaround, roll back to LR 11.2.

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