"Unfortunately, the catalog _____ cannot be repaired"

[Sarai0D45]

Hello, 

I recently had lightroom malfuction in the middle of backing up. It said that it couldn't back up and needed to quit. But when I tried to reopen it, it said that the catalog was corrupt and asked if I'd like to repair it. After trying to repair, it then said "Unfortunately, the catalog _____ cannot be repaired." 

Can anyone please help me with this ? I've had my backups to set to back up weekly, but for some reasons it hasn't been doing so the last 4 weeks - even though it's asked me to back up and I've said yes - no problem. 

I even tried moving the catalog to a different hard drive.. it would open the catalog with everytyhing there, then immediately say that their was an error and it needed to quit. 

[KR Seals]

The destination folder for the LrC backups may have been accidentally changed. Do a search of your drives for ".lrcat.zip" The files you find will be inside dated folders. This should allow you to find your newest backup.