Unexpected error opening catalog

[amirt49086715]

Help!

I have an issue that began after I got a notification that my catalog couldn't be opened because it was being used by another application. I followed the FAQs and moved the .lock file to the recycle bin. Now, I get an error message that reads, "Unexpected errro opening catalo."

What should I do?

[Geoff the kiwi]

Which OS and which version of Lightroom.

Say a bit more about what happened and what you did in exact steps please..

[luisd78833992]

I have the same problem. Just like that!!...

I'm workin with Mac OS Monterey 

[Rob_Cullen]

"...being used by another application..."

This indicates that the Catalog was not closed down in the proper manner at the last use. The usual fix is to delete the file with the file-type suffix of .LOCK  then try to re-open the Catalog. (the .LOCK file should only exist when the Catalog is open.)

"Unexpected error opening catalog."

This is more serious and suggests that there is catalog corruption- which possibly caused the .LOCK file to be left in situ.

The usual answer is to restore a Catalog from a recent Catalog backup.

https://helpx.adobe.com/lightroom-classic/help/back-catalog.html

https://www.lightroomqueen.com/disaster-strikes-corrupted-catalog/#restore