Unable to open Lightroom Classic with error "catalog already in use"?

New Here ,
Apr 19, 2018 Apr 19, 2018

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I don't understand the error I'm getting when I try to start Lightroom Classic CC.  The error is that the catalog is already in use by another app.  Any suggestions?

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correct answers 1 Correct answer

Adobe Employee , Apr 19, 2018 Apr 19, 2018

Hi Deepwaterrow,

I believe you're using windows, if yes, then please go to the catalog's location and there you'll see a file ending with ".lrcat.lock" please delete that file and let us know if that helps.

The default location of a catalog file on windows is: C:\Users\Username\Pictures\Lightroom


Please follow this link for mac location: Lightroom catalog cannot be opened

Regards,
Sahil

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Adobe Community Professional ,
Apr 19, 2018 Apr 19, 2018

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Open the folder where the catalog (*.lrcat) is located on your drive.

You'll probably see a *.lock file there. If yes, delete it ... only this one (1) file!

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New Here ,
Dec 22, 2021 Dec 22, 2021

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I do this and the next time i try the lock file is back

 

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LEGEND ,
Dec 22, 2021 Dec 22, 2021

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"I do this and the next time i try the lock file is back"

 

After deleting the .lock file, starting LR, exiting LR, and then starting it again, are you still getting the message that the catalog is in use?

 

In normal operation, the .lock file should appear while LR is running, and when LR exits, it will delete the .lock file.

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Adobe Employee ,
Apr 19, 2018 Apr 19, 2018

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Hi Deepwaterrow,

I believe you're using windows, if yes, then please go to the catalog's location and there you'll see a file ending with ".lrcat.lock" please delete that file and let us know if that helps.

The default location of a catalog file on windows is: C:\Users\Username\Pictures\Lightroom


Please follow this link for mac location: Lightroom catalog cannot be opened

Regards,
Sahil

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