Lightroom: "LR 4 catalog cannot be opened"

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  • Updated 4 years ago
  • (Edited)
The message reads "LR 4 catalog cannot be opened because another application already has it opened." I was trying to export files from LR to my back up hard drive when this occurred. It gives me the option to choose a different catalog, but no other catalogs are listed.

I have uninstalled and reinstalled...no change. I have removed the back up hard drive....no change. Help please!!
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Penne Fossa

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Posted 4 years ago

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Victoria Bampton - Lightroom Queen, Champion

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Find your catalog on the hard drive, probably in your pictures folder by default. Next to it, with LR closed, there's probably a file ending in *.lock. Delete it then restart LR and try again. It's supposed to be deleted automatically when LR closes, but rarely it can get stuck.
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Penne Fossa

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Thank you! All better now! :)