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LRC won't open - says Catalog being used by another app

Participant ,
Oct 15, 2021 Oct 15, 2021

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Lightroom bug.png

 

Not sure why this has suddenly started happening when I try to open Lightroom Classic. Even when all other apps/programmes have been shut down I keep getting this error message and it refuses to open.

 

Running latest version of LRC on Win 10 Pro

 

Any help gratefully received!

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correct answers 1 Correct answer

Community Expert , Oct 15, 2021 Oct 15, 2021

Look in your catalog folder for a file called "Catalogname.lrcat.lock". Lightroom creates this .lock file to prevent other apps opening the catalog at the same time, and deletes it on a normal quit. If the quit was not normal, that file remains and then prevents Lightroom itself to open the catalog. Delete it and your problem should be gone.

 

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Community Expert ,
Oct 15, 2021 Oct 15, 2021

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Look in your catalog folder for a file called "Catalogname.lrcat.lock". Lightroom creates this .lock file to prevent other apps opening the catalog at the same time, and deletes it on a normal quit. If the quit was not normal, that file remains and then prevents Lightroom itself to open the catalog. Delete it and your problem should be gone.

 

-- Johan W. Elzenga

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Participant ,
Oct 15, 2021 Oct 15, 2021

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Hi Johan,

 

Thanks very much for your quick reply. That seems to have done the trick 👍

 

Appreciate the help.

 

All the best, Rob.

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New Here ,
Oct 11, 2022 Oct 11, 2022

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But where do you find the catalog folders to delete this one?

 

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Community Expert ,
Oct 11, 2022 Oct 11, 2022

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LATEST
quote

But where do you find the catalog folders to delete this one?

 


By @cayleys16163255

 

I don't know where you store your catalog! The default location is a folder called 'Lightroom' in your 'Pictures' folder.

 

-- Johan W. Elzenga

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