I am trying to simply access a catalog on a external hard drive - in Lightroom Classic

[daveleephotography.com]

I am trying to open a catalog on an external hard drive in photoshop classic and it keeps telling me it is in use by another application. I cant see that it is. I tried shutting down everything on the computer and rebooting that should shut down all applications, but it comes back up with the same comment.   HELP!

{Thread title edited by moderator}

[nikunj.m]

Hi,

We're sorry about the trouble while trying to open your catalog. I believe you are referring to Lightroom Classic & not Photoshop Classic, right?

Please check out: https://helpx.adobe.com/lightroom-classic/kb/lightroom-error-catalog-cannot-be-opened-lrcat-lock.htm...

Let us know if this helps!

Regards,

Nikunj

[ManiacJoe]

Most likely what happened is that a previous run of Lightroom did not close down correctly and left a "lock" file on the drive, which marks the catalog as still in use.

Using your computer's file browser, navigate to the folder containing your LrCat file. If there is a ".lock" file with the same name as your catalog, delete the ".lock" file. Delete nothing else.