Skip to main content
はまぐち
はまぐち
Participating Frequently
June 20, 2026
Question

AI Denoise fails with "Unexpected error occurred while processing (1)"

  • June 20, 2026
  • 3 replies
  • 295 views

Environment

- MacBook Air M4
- macOS 15.7.3
- Lightroom Classic 15.3.1

Issue

AI Denoise fails immediately with the following error:

"Unexpected error occurred while processing (1)"

What I have tested

- The issue occurs with multiple RAW files
- Mac has been restarted
- Rolled back Lightroom Classic from 15.3.1 to 15.3 (same result)
- AI Masking works normally
- Enhance Details works normally
- Super Resolution works normally
- Previously generated Denoise DNG files open and edit correctly
- Only AI Denoise fails

Additional information

AI Denoise was working normally yesterday. This issue first appeared after updating today.

Has anyone experienced the same issue or found a solution?

Thank you.

 

      3 replies

      tgweber
      tgweber
      Inspiring
      June 20, 2026

      Perhaps this might be a workaround.

      I am on a M4 Mac mini, running OS 26.5. I unfortunately updated PS and CameraRaw today, but could not find LrC 15.4. So, I went back to editing in LrC 15.3.1, and Denoise stopped working.

      In trying to fix the issue, I notice there was a CameraRaw folder in my ...

      /Library/Application Support/Adobe

      ... folder, so I pull it out onto my Desktop and restarted LrC.

       

      Denoise was started working again!

      Hope this might be of some help.

      K
      Adobe Employee
      KrishnaMaithreya
      Adobe Employee
      June 20, 2026

      Updating to latest LrC version 15.4 would most likely solve the issue.

      はまぐち
      はまぐちAuthor
      Participating Frequently
      June 20, 2026

      Thank you.

      I am currently using Lightroom Classic 15.3.1 and Camera Raw 18.4.0.2608.

      However, Lightroom Classic 15.4 is not yet available in my Creative Cloud app.

      Is there any way to access 15.4 now, or should I wait for the rollout?

      （ありがとうございます。
      現在 Lightroom Classic 15.3.1 と Camera Raw 18.4.0.2608 を使用しています。
      ただし Creative Cloud にはまだ Lightroom Classic 15.4 が表示されません。
      15.4を今入手する方法はありますか？それとも配信を待つ必要がありますか？）

      K
      Adobe Employee
      KrishnaMaithreya
      Adobe Employee
      June 20, 2026

      Check this page - https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-denoise-issues.html

      SPBaldwin
      SPBaldwin
      Participant
      June 21, 2026

      Not really helpful - would appreciate the HOW as opposed to the WHAT I need to do. 

      JohanElzenga
      Community Expert
      JohanElzengaCommunity Expert
      Community Expert
      June 21, 2026

      The link in some another answer here is not correct, you need camera raw 18.3, not 18.5 (which does not exist yet). Try this: download Camera Raw 18.3 from here (Mac) - https://download.adobe.com/pub/adobe/photoshop/cameraraw/mac/18.x/CameraRaw_18_3.dmg

      Run the installer and DO NOT update in Creative Cloud - make sure auto updates are turned off before you start.

      -- Johan W. Elzenga
      Terms & ConditionsAccessibility statement
      Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices