Greetings. I recently updated to the 10.0 release and have started receiving this error in some but not all cases. "?:0: attempt to compare two nil values" I am trying to add photos to various collections and occasionally this error pops up in a dialog and fails to add. I can add other photos to the same collections. I can also add the same photos to other collections. But certain specific combinations of photo and collection give the error. I have Optimized my Catalog, restarted Lr, and restarted my computer.The problem feels like it os occuring more often as I go.It seems somehow correlated with trying to add to several different collections whiling changing my selection in between, but... I haven't been able to nail down a repeatable pattern. I would very much appreciate any assistance. I do see a reference to this error in the forums, but from 2016 for a very different context, and the solution relies on dead links.

DanielB_17

Participating Frequently

Answered

On Add to Collection: ?:0: attempt to compare two nil values

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Greetings.

I recently updated to the 10.0 release and have started receiving this error in some but not all cases.

"?:0: attempt to compare two nil values"

I am trying to add photos to various collections and occasionally this error pops up in a dialog and fails to add. I can add other photos to the same collections. I can also add the same photos to other collections. But certain specific combinations of photo and collection give the error.

I have Optimized my Catalog, restarted Lr, and restarted my computer.
The problem feels like it os occuring more often as I go.
It seems somehow correlated with trying to add to several different collections whiling changing my selection in between, but... I haven't been able to nail down a repeatable pattern.

I would very much appreciate any assistance. I do see a reference to this error in the forums, but from 2016 for a very different context, and the solution relies on dead links.

Problem or error

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johnrellisCorrect answer

Legend

Also, as a workaround, select the target (destination) collection, do the menu command View > Sort, and choose a sort order other than Custom Order.

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johnrellis

Legend

Another workaround that's helped some: Create a brand new collection.

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lukasw60000753

Participant

Unfortunately I didn't work for me. I changed the destination (target destination) and the sort order but with no success. Yesterday it was working fine and now all of sudden this. I uninstalled LR and installed it again without success. I hope there is a fix soon because this is super annoying. I will try it on another Mac, maybe there is works.

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Crewchief

Participant

Having the same problem as well after the update, the work around worked out for me. I don't usually change the sort order off Custom, so this didn't occur to me. Thanks for a temporary solution.

Adobe, please fix!

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deniset38361274

Participant

Thanks. That worked for me. 😉

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MerkurNJ

Known Participant

Changing the target folder from Custom order to date order fixed this for me.

Paul

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Michael F 66

Participating Frequently

Changing the target folder from Custom sort order to something else worked for me too. But I usually have my Collections in Custom order, so this is an annoying glitch.

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photoartbycarolyn725

Participant

I usually have my collections in Custom sort order also, so find this
glitch annoying too.

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B.S. + Lykkefund Paper

Participant

...just got the same problem... "?:0: attempt to compare two nil values"...

seems like adobe itself has to fix it...got no solution by myself...

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Jbean25

Known Participant

I'm having the same issue, starting tonight, and a google search led me here. Changing the target collection sort order to something other than Custom fixed the problem for me. Very frustrating! Thank you for supplying a temporary workaround johnrellis!

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photoartbycarolyn725

Participant

This has been bugging me too, and the workaround you have suggested does seem to work. Mine happened after update. Wish I'd searched more thoroughly earlier. I just found this today. Would be nice for Adobe to send out a notice of this problem and the workaround.

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johnrellisCorrect answer

Legend

Also, as a workaround, select the target (destination) collection, do the menu command View > Sort, and choose a sort order other than Custom Order.

[Use the blue reply button under the first post to ensure replies sort properly.]

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DanielB_17Author

Participating Frequently

Excellent observation!! I didn't even realize some of the collections had somehow been set to custom order. I pretty much never do that on purpose so it never occurred to me to check.

This is almost as good as a fix for my workflow 🙂

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johnrellis

Legend

A number of people have reported this error when adding photos to collections after updating to LR 10. Please add your constructive opinion to the bug report:

https://feedback.photoshop.com/conversations/lightroom-classic/lightroom-classic-when-trying-to-add-files-to-collections-i-get-this-error-0-attempt-to-compare-two-nil-values/5f9091ea35f40c2520b9ecc4

and be sure to click Like and Follow at the bottom of the first post. That will make it a little more likely that Adobe will prioritize a fix, and you'll be notified when the bug's status changes.

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GoldingD

Legend

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut as that is just so much dead space to us non-Techs.

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DanielB_17Author

Participating Frequently

Lightroom Classic version: 10.0 [ 202010011851-ef6045e0 ]
License: Creative Cloud
Language setting: en
Operating system: Mac OS 10
Version: 10.15.7 [19H2]
Application architecture: x64
Logical processor count: 16
Processor speed: 3.6 GHz
SqLite Version: 3.30.1
Built-in memory: 32,768.0 MB
Real memory available to Lightroom: 32,768.0 MB
Real memory used by Lightroom: 2,034.3 MB (6.2%)
Virtual memory used by Lightroom: 11,115.9 MB
Memory cache size: 103.0MB
Internal Camera Raw version: 13.0 [ 610 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 75MB / 16383MB (0%)
Camera Raw real memory: 78MB / 32768MB (0%)
Displays: 1) 5120x2880, 2) 1920x1200

Graphics Processor Info:
Metal: AMD Radeon Pro 580X

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/berdine/Pictures/Lightroom/DPB Primary LR Catalog-v10.lrcat
Settings Folder: /Users/berdine/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock

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GoldingD

Legend

Just the one plugin?

Plugins can be buggy

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