P: Unexpected error occurred during export with specific file

[jenn22555465booq]

I'm in the middle of editing a gallery for a client and I've exported about 100 photos so far and just now I got a pop up during export that says "unknown error occurred", and doesn't allow the image to be exported.  Anyone have any idea why this would be happening? I had a remote session with an agent who was no help whatsoever and just sent me here. I'm hoping someone has had experience with this.

Thanks in advance!

[John R Ellis]

We'll need more details:

1. Do the menu command Help > System Info and copy/paste here the first ten lines.

2. Is it one photo or many photos that cause the problem?

3. What type of photos are being exported -- raw, TIFF, JPEG, etc.

4. Do the problem photos have Brush masks? E.g. see 

https://community.adobe.com/t5/lightroom-classic-bugs/p-export-at-full-res-fails-on-tiff-with-partic...

[jenn22555465booq]

I'm not sure if it was a colour profile it wasn't liking or what, but when I reset the photo to it's original version before any of the edits I made, and re-edited it, it solved the problem and I was able to export as usual.  Still an unknown reason for the error, but at least just a simple resetting of the image solved it.

Thank you!

[John R Ellis]

Glad you solved it. If it happens again, make a virtual copy of the problem photo before resetting its settings. That way, we might be able to reproduce the problem and file an actionable bug report with Adobe.

[jenn22555465booq]

Will do. Thanks so much.

[RMACH]

Similar problem. Exporting from DNG files to JPG files, but two files would not export "unknown error occurred". Back-tracking through my edits it appears that the Luminance Smoothing edit is what causes the problem with both photos. If I export before the Luminance Smoothing in the Develop History, it works, but anywhere including or above the Luminance Smoothing entry in the Develop History and the Export fails. Below is my system info as requested (upgraded to Win 11 but this does not show)

Lightroom Classic version: 11.4.1 [ 202206241800-b406ce4c ]
License: Creative Cloud
Language setting: en
Operating system: Windows 10 - Home Premium Edition
Version: 10.0.22000
Application architecture: x64
System architecture: x64
Logical processor count: 16
Processor speed: 3.7GHz
SqLite Version: 3.36.0

[John R Ellis]

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To make progress on narrowing this down and getting a bug report filed with Adobe, we'll need a sample catalog (containing the history steps) and the problem photo.  To do that, select one of the problem photos and do File > Export As Catalog with these settings:

Zip up the exported catalog folder (which will contain a copy of the selected photo), upload the .zip to Dropbox, Google Drive, or similar, and post the sharing link here.  

Without a reproducible test case, Adobe isn't going to look at the issue unless very many people report the same symptoms.

[RMACH]

Thanks for the guidance. Here is the catalog with a problematic photo. I will be interested in knowing if it is easily replicated by others.

[John R Ellis]

Very good -- with that sample catalog and DNG, I see the same misbehavior.  Exporting the photo produces:

After selecting the history step immediately before Luminance Smoothing:

the photo exports without problem.

[John R Ellis]

@Rikk Flohr: Photography, please move into Bugs. RMACH provided a sample catalog containing one DNG that reproduces the problem, as I verified above.

[Rikk Flohr: Photography]

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