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Light room catalogue cannot be opened because it is running in another application.

New Here ,
Aug 02, 2020

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I switched catalogues in the normal way but when switching back a pop up box says the catalogue cannot be opened because another application already has it open. I don't have another application, I only have Lr on my desktop and no other devices. I am using Lightroom not lightroom classic.

 

Any ideas... please?

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How to, Problem or error, Windows

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Light room catalogue cannot be opened because it is running in another application.

New Here ,
Aug 02, 2020

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I switched catalogues in the normal way but when switching back a pop up box says the catalogue cannot be opened because another application already has it open. I don't have another application, I only have Lr on my desktop and no other devices. I am using Lightroom not lightroom classic.

 

Any ideas... please?

Topics

How to, Problem or error, Windows

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13

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WobertC LATEST
Adobe Community Professional ,
Aug 02, 2020

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You must be using a Standalone version of Lightroom 5 or 6.

The error message "cannot be opened because another application already has it open." indicates that the Catalog is 'LOCKED' - usually because it was not closed/exited in the correct manner when last used.

Normally 'switching Catalogs' would not cause this problem.

With the File Browser (Finder/Explorer) Find the 'Locked' catalog folder and delete the file with the file-type suffix of .LOCK. (eg. like- Catalog Name.lrcat.LOCK)

Do NOT delete anything else!

Then [double-click] the .LRCAT file to open the Catalog.

 

 

Regards. My System: Lr-Classic 9.4, Lightroom 3.4, Photoshop 2020 (21.2.1), Nikon DSLR, Windows-10.

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