Corrupt Catalogue file - about 5 years of work lost.
I'm syncing my Lightroom Clasic through the Creative Cloud files. Satuday I uploaded 2 new 128 GB cards and started developing the images. When i quit lightroom it hung up, would not close and the application became unresponsive. I'm running a fully loaded iMac Pro, OSX 10.14.5 and Lightroom is up to date as of today. All original files are stored on an mirrored external thunderbolt drive with 5 enterprise level drives. The gear is all first rate.
On Sunday evening I opened up Lightroom to keep editing and I got the dreaded catalogue file corrupted error. After the failed repair and shutdown I copied the entire folder, moved it to a new location for safety, then tried opening Lightroom again with no luck. An internet search revealed a way to repair the LRCAT file using the terminal and some SQL tools built into the Mac. I did this and the first time everythig looked like it worked but the file faled to open again and tried to go through the repair. I figured I would open up one of the zip files from the backups that I do twice a week but sadly, those files would not open either. There also does not seem to be any way to get Lightroom to open up and ask you for a catalogue so the constqnt crashes were not giving me a chance to try something else and if I just tried to open Lightroom by opening a backup file it would crash again and write a bunch of new data to the existing files.
I even went back to a Time Machine backup and triedd to open that. Now I have about 7 copies of my LRCAT that are reporting as corrupted and can't be fixed by any method I have tried. I have even uninstalled Lightroom, rebooted the computer, deleted a bunch of the files from the Library/Applicaiton Support/Adobe folder which was a suggestion from this forum. I finally gave up and just created an entirely new catalogue by renaming the LRCAT files, moving them, and starting a new Catalogue in a new folder. Almsot 4 hours later my images were all back in place, the folders were all where they should be but the collections were all gone and I think that the adjustments to many of the images are also fouled up. I have not had a chance to verify that yet.
So here's my quesiton, has anyone had this kind of caterstrphic failure happen before? Do you know any other solutions to repair the LRCAT files?
It also turns out that my Creative Cloud folder isn't updating. It's been syncing for more than 4 hours and it's is still showing 4 out of 5 and 2 seconds remaining even after three re-boots of both systems.
This is a real mess. About 28,000 images, hundreds of catalogues and months of work apparently gone. At least all of the images are backed up. I really want to know why the backups won't open - not one of them, and I want to know why the Lighroom won't give you the opportunity to choose a library when you open it. There shold also be an option to save your library as a different name like you can in every other app so you can generate backups and copies whenever you want.
Any ideas on how to recover the corrupted catalogue files wuld be appreiated. I think that I'm going to have to go back to a system where each project has it's own LRCAT file because I can't afford to work for another year and then loose all of my sorting and organizing.

