LR6 Catalog missing

So, now that my Windows 10 install issue has been fixed, I'm having a small LR6 issue. All my catalogs are showing except my 2016. The files for all the catalogs are in the same place, but LR isn't picking this one up.

How do I get it relinked?

File / Open Catalog
Navigate to the desired *.lrcat, select it.

Do you mean that the catalog is missing or that it opens but does not link to the source images?

It's missing in LR. It's still on my desktop, just not getting pulled into LR.

tzalman wrote in post #17954311
File / Open Catalog
Navigate to the desired *.lrcat, select it.

That's not working. When I follow those steps, it's making me select each individual picture. I can't bring the whole catalog in.

Open the desired catalog, then select just the images you want to import/use in your working catalog, then choose to "Import as a Catalog" and you will get those pictures with edits/Exif intact.

If you don't want the unselected photos you can delete them, or you may want to keep them as an archive. In Lightroom you have a lot of freedom to choose, just think things through!

Tony, I want to import all of them - the entire catalog. It's a couple thousand images. I have my filing system by Year (catalog) and then by date taken. 2014 and 2015 are showing but 2016 isn't despite being in the same folder as the other 2.

Hmm...it's hard when we can't "see" how you have things laid out...maybe some screen shots of your Folder panel and from your system explorer?

Ok then, Close LR go to the 2016 catalog find the lrcat file and double click on it. It associates itself with LR and will tell LR to open it.

That is not possible; the only file formats supported in the Open Catalog navigation pane are .lrcat, .lrbd and .aglib. Those are not image formats nor are they Raw formats. Your catalog should have the .lrcat suffix. If you can't find it there, you have not navigated to the right place - it would be very unusual to have the catalog file
and its attendant files and subfolders (lock file, journal file, previews subfolder) in the same folder with image files.

Are you saying that you have three separate Lightroom Catalog files (*.lrcat files), one for each year and you can see the three files in Explorer/Finder ? If so, do as Travis suggests - double-click on 2016.lrcat. Or are you using the word "catalog" in some more general sense, a group of photo files in a folder titled 2016, and not as a reference to a Lightroom database file?

If it is the second scenario, do you have more than one Lightroom Catalog? In the LR menu bar, click on File/Open Recent. How many LR Catalogs are listed there? When you launch LR, what Catalog is active?