Try unzipping your last backup and copy the named catalog (.lrcat file) into your LR Folder in Pictures (or wherever you keep your catalog if not using the default location) in place of the exiting .lrcat file. Double click on the backup file to launch.
May i know where the Lightroom catalog is being saved. Copy the catalog from desktop and double click on it to open it from there.
If that does not work.
Unzip any of the latest backed-up catalog and check them are you able to open them.
Double-click the zip file. Windows will open the file, and then you can copy the catalog file and place it where the old one and was located. Then you should be good to go.
Catalog is saved in Pictures/Lightroom folder--along with older catalogs
from LR 4. Backups are on an external drive, easily copied to same folder
on hard drive. Can't open LR from desktop list of programs or from
program icon(s), or from Pictures library folder.
I've been trying to unzip a backup and do as you suggest but haven't yet
been able to do that. Will keep trying.
On Tue, Dec 1, 2015 at 2:33 PM, deepakgahlot <firstname.lastname@example.org>
Double-click the zip folder and choose Extract Files.
I've done all of that, and I still get the same error message: catalog
could not be opened because of an unexpected error.
If I click on "choose another catalog," there isn't another option.
(I even tried using a backup catalog with a new name, and I got an error
message saying the catalog was too new to use with "this version" of LR.)
The file in my unzipped backup(s) is a DAT file. There is no LRCAT file.
I always make the backups using the LR backup utility, just choosing an
external drive for the location.
No amount of trying to use other iterations of the catalog seems to make
any difference. LR 5 still works just fine; PS CC (including Camera Raw)
works just fine. I just cannot find any way to open LR CC. I even removed
the catalog lock at one point. I've tried to remove the current catalog
and substitute a backup several times. I've tried to "select a different
catalog" using button in the error message window, but I get another
message saying "Lightroom has stopped working." (In fact, it had frozen,
which was why I had to shut the computer down using power button in the
Is it possible that I simply need to uninstall and then reinstall LR CC?
Would that be likely to work? And is there anything I should look out for
if I have to do that? (E.g., can I leave the current catalog in the
Lightroom folder? or how do I get a catalog imported into a new install?)
This is very frustrating, and I would surely appreciate any further ideas.