Photoshop won't open DNG files from the NAS, while LightRoom can. Permissions bug?

Community Beginner ,
May 28, 2021 May 28, 2021

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Hello,

 

Dragging a DNG file from my NAS into Photoshop always results in one of these two errors:

  • "Could not complete your request because Photoshop does not recognize this type of file." (almost all the time)
  • "File could not be opened due to a disk error." (rare)

 

However, dragging a copy of the DNG from the Desktop instead works fine, by opening Camera Raw and the image in it.

 

This is odd because LightRoom (latest) opens all my Raw files from the same NAS without issues.

 

Specs

  • Computer: MacBook Pro (15-inch, 2019)
  • OS: macOS Big Sur 11.4 (latest)
  • Network: Synology NAS, formatted in SHR2, file system is btrfs
  • Photoshop version: latest (22.4.1)
  • Camera Raw version: latest (13.2)
  • macOS System Preferences > Security & Privacy as follows (note how Photoshop doesn't have checkboxes for Removable Volumes nor Desktop, while being able to open photos from the Desktop...):

Screen Shot 2021-05-28 at 7.51.17 pm.png

Note: Lightroom instead has all the privacy checkboxes and in fact it works fine with my Raw files on the same NAS:

Screen Shot 2021-05-28 at 7.58.31 pm.png

This makes me think that Photoshop failed to ask for all the same permissions that both Lightroom and Bridge ask for, which makes them work as intended.

 

Things I've already tried

  • Uninstalled/reinstalled Photoshop
  • Downloaded and reinstalled Camera Raw
  • Added even more macOS System Preferences > Security & Privacy settings:

Screen Shot 2021-05-28 at 7.50.31 pm.pngScreen Shot 2021-05-28 at 7.50.06 pm.png

Thank you for your help.

TOPICS
Bug, Import and export, Mac, Problem or error

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correct answers 1 Correct Answer

Community Beginner , Jun 07, 2021 Jun 07, 2021
Leaving a reply as after 2 weeks of testing various things out, Photoshop has suddenly decided to work as intended for no apparent reason. Sorry for not being able to explain how I got it to work. I have no idea. And a big thank you to those who helped!

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Adobe Community Professional ,
May 28, 2021 May 28, 2021

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Your NAS is in the wrong format for newer Mac OS. Mac OS will throw errors all day due to not being compatibly formatted ExFat with new OS specifications. Macs use HFS+ or APFS format but ExFat can be read by both Win and Mac. 

Kevin Stohlmeyer Adobe Community Professional/Adobe Certified Instructor

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Community Beginner ,
May 28, 2021 May 28, 2021

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I've been using LightRoom without issues off of the same NAS for months. The issue is with Photoshop only.

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Community Beginner ,
Jun 01, 2021 Jun 01, 2021

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Anyone else who could help with this please?

As stated before, Lightroom works perfectly, it's just Photoshop which won't open the DNGs.

Thank you

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Adobe Community Professional ,
Jun 02, 2021 Jun 02, 2021

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If its just specifically the DNGS, check your version of the Camera Raw Plugin - what version are you currently on?

 

Kevin Stohlmeyer Adobe Community Professional/Adobe Certified Instructor

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Community Beginner ,
Jun 02, 2021 Jun 02, 2021

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Hey Kevin, it’s the latest version. I also reinstalled the same latest version from the Adobe website using the standalone installer, just to make sure, and it still won’t open the DNGs from the NAS. It does open them when local on my SSD however. LightRoom instead works with both. Any other idea? Thank you

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Adobe Community Professional ,
Jun 02, 2021 Jun 02, 2021

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However the fact that you can drag the DNG to your desktop and open tells you that it is an issue with your NAS drive. LR may work but this is a known issue with Apple Catalina and Big Sur and Photoshop. The solution is to format your externals to a Mac Compatible format for the Mac OS to read properly. 

Kevin Stohlmeyer Adobe Community Professional/Adobe Certified Instructor

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Community Beginner ,
Jun 02, 2021 Jun 02, 2021

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I see. However this doesn’t explain how come LightRoom is able to open the DNGs while Photoshop can’t. In the screenshots I’ve shared this seems to boil down to a lack of permissions on the Photoshop part. LightRoom requests for access to remote volumes while Photoshop doesn’t. This would explain why one works while the other doesn’t, as if the OS had issues accessing the NAS, neither would work.

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Adobe Community Professional ,
Jun 03, 2021 Jun 03, 2021

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It may well be that Lightroom is not working with the original DNG but with a cached version from the library. It looks to me like a timing problem on the network. I suspect the DNG file to be quite huge.

ABAMBO | Hard- and Software Engineer | Photographer

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Adobe Community Professional ,
Jun 03, 2021 Jun 03, 2021

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Just tried it with a 620 MB dng from my NAS (it's a superresolution file created by camera raw) and photoshop opens it without any issues. Don't think filesize matters. I think the OP somewhere else noted it is actually the smaller files that are problematic. 

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Community Beginner ,
Jun 07, 2021 Jun 07, 2021

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Actually I recently discovered that Photoshop will open the much larger multi-shots DNGs (created in camera by my Leica SL2, 350 MB each), but it won't open the base, single-shots DNGs (47 MP each).

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Adobe Community Professional ,
Jun 03, 2021 Jun 03, 2021

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Can you share one of the files that doesn't work? I use the exact same setup (a synology NAS formatted the exact same way - I posted on the reddit forum too which is how I found this thread) and have no problems whatsoever with opening files (dng, NEF, tiff, psd, etc.) directly in Photoshop/camera raw from it on a fileshare mounted through SMB. There is absolutely no reason why this wouldn't work. The underlying filesystem on a NAS does not matter whatsoever. It's irrelevant since the filesystem is not exposed to the client operating system. It's just a filesharing mount. My experience shows this is clearly the case. 

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Community Beginner ,
Jun 07, 2021 Jun 07, 2021

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For some reason now Photoshop opens them without issues. I couldn't get it to work for over 2 weeks. Now it works with all of them. I didn't change a thing, no idea why it's working! Thanks for the help anyway!

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Community Beginner ,
Jun 07, 2021 Jun 07, 2021

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Leaving a reply as after 2 weeks of testing various things out, Photoshop has suddenly decided to work as intended for no apparent reason. Sorry for not being able to explain how I got it to work. I have no idea. And a big thank you to those who helped!

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