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Catalogue won't open

Christine Dengate

New Member
Mar 30, 2013
Lightroom Experience
My active catalogue won't open and the following error message comes up.
The Lightroom catalog named “Lightroom 3 Catalog” cannot be opened because another application already has it opened.
I have restarted the computer and still getting the error message. There is no other program using the LR catalog.
Ideas anyone?

Brad Snyder

Senior Member
Nov 20, 2007
Port Deposit, Maryland USA
Lightroom Experience
In the folder/directory where the catalog resides, look for a file named the same as the catalog, with the file type of *.LRCAT.LOCK. Delete that file. If you see one named .JOURNAL, leave it alone.

Oh, and welcome to the forums!