I cannot open LR classic. Message "Lightroom catalog - 2 cannot be opened because another application already has it opened" Help please.

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  • Updated 5 months ago
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This conversation has been merged. Please reference the main conversation: Lightroom Classic: Will not launch, it keeps saying another service already has Catalog 2 open, close this copy and try again?

I cannot open LR classic on my laptop. I get a message saying "Lightroom catalog - 2 cannot be opened because another application already has it opened" Help please.
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Darryll Benecke

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Posted 7 months ago

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Sunil Bhaskaran, Official Rep

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Could you please see where your catalog is located?
Do you see any file with .lock extension?

Thanks,
Sunil
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Darryll Benecke

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Thanks Sunil.
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Roelof Moorlag

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Move the both files selected above to another location and try to start Lightroom again. (The name of your catalog may be different). When LR does start again, you can delete those two moved files.
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Johan Elzenga, Champion

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It's better not to move the -wal file. That file won't stop Lightroom from opening the catalog and it might be needed to repair the catalog. Just move the -lock file. That is the file that tells other applications that Lightroom has opened the catalog, and if that file isn't deleted upon quit (because Lightroom didn't quit correctly) then it stops Lightroom from opening the catalog again.
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Darryll Benecke

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Thank you. Your advice worked perfectly.
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Julie Freeman

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I am having this same issue and when I try to move the .lrcat.lock file I get an error that reads

"The Finder can’t complete the operation because some data in “Lightroom Catalog-2.lrcat.lock” can’t be read or written.
(Error code -36)
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Did you get this sorted? If you quit Lightroom and then try and remove the .lock file does it work?
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Arnold Bartel

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As LR 7.2. crashes very frequently at my system I have this issue very often when trying to restart LR. Sometimes the *.lock and *.wal files are write protected and connot be deleted or moved. So I even have to restart my entire PC (win 7)!
Very annoying.
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Johan Elzenga, Champion

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Lightroom should not crash frequently to begin with. Do you have any old plugins installed that might cause this?
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Arnold Bartel

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Thank you Johan.
I tried your advise and disabled all plugins in the plugin manager. Unfortunately without success.
LR classic CC 7.2 kerps on crashing very frequently. Sometimes even in „idle“ state without user interaction (See also https://feedback.photoshop.com/photos... )
Of course you are right, it should not crash then this issue will be irrelevant.
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Are you syncing to Lightroom mobile? Did you try the solution posted in the link you posted above? I would continue this conversation on that link as it's probably more relevant to what you're seeing.
(Edited)

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