LR informa que meu catálogo está corrompido, não consegue reparar e com isso não abre o programa.

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In your screenshot showing where your catalog is located, the first screenshot, at least two older versions of the catalog show up.

Now, as you are having issues with your current catalog, keep a backup of those older catalogs on an external hard drive until you are happy with the current one, and have a good backup of the current one in a safe location.

These old catalogs are eating up space on your C drive. Or is that D drive, cannot read the small screenshot.

You will notice several related files/folders associated with those catalogs, data that can be dumped.

some links:

https://lightroomkillertips.com/which-files-can-i-delete/

https://laurashoe.com/clean-up-your-lightroom-mess/

Backup

Backups are kept in case of failure. Failure of a particular file, a folder, or a hard drive. As such, backups should not be on the same hard drive as the original data. That C drive breaks, your catalog is gone, your backup is gone.

Backups can be on any hard drive, or a NAS, or even the cloud. (note working catalogs cannot be on a NAS)

External hard drives are very good for backups, multiple external drives, even better, as one could be locked away, somewhere for safety from theft, natural disasters to some point, etc.

Separate internal hard drives can also be used for backup, and if available should be. Preferably, along with an external hard drive backup.

Good practice is at least two backups. Better practice adds a backup that gets locked away somewhere, not near the computer.  Extremely good practice (more of a business model) is to include an external backup that is shipped off site, away from earth quakes, fires, storms, attacks, etc (well past normal home user practices)

Also, use of third party backup applications is reccomended.

Author stated “ My LR Catalog (.IRCAT file)“

That should be My LR Catalog (.LRCAT).

It's not .ircat.

Sounds like lack of hard drive space, you may need to add an additional hard drive. Preferably SSD but not an absolute requirement. It can be internal (on a desktop computer) or external.

For LrC, the following is of note:

• The catalog can take advantage of being on a fast hard drive
• The Library previews must be on the same drive as the catalog, within the same parent folder
• The photos can be on any hard drive, hard drive speed of little importance
• The Photos do not have to be on the same hard drive as the catalog
• The Camera RAW CACHE can take advantage of being on a fast hard drive
• The Camera RAW CACHE can be on any hard drive
• The Camera RAW CACHE does not need to be on the same hard drive as the catalog
• For Windows computers, try to avoid putting the Camera RAW CACHE on the same drive as the Windows Paging file (normally C) as the two will compete for read/wrights to/from the hard drive.

I had to copy again what I did because these silly smiley icons appeared where the LETTER DEE should be:

1. What hard drive is your catalog on? Looks like C.  My LR Catalog (.IRCAT file) is originally on my DEE drive which is an internal HD with 1 TB which is where I keep my data once the C: drive is an internal SSD drive used for booting up the computer with the Windows programs along with all other programs.

2. In that hard drive, how much space in percent (%). Looking for at least 25%:  On my original HD where I had my LR .IRCAT file and backups originally, I have about 550 GB free space.  On my SSD drive which I was now forced to copy LR over to so that it would at least open, I have about 7 GB of free space which is about 7% only.

3. What other hard drives do you have?  I have no other drives.  Just the SSD (102 GB) which is C: drive to boot up the computer (and LR and PS programs) and the 1 TB HD which is DEE drive.  Just these two drives.

4. Where do you keep your photos? What hard drive?  My photos are all kept on the internal DEE drive 1 TB HD where all my data is kept.

5. Where do you keep your catalog backup? What hard drive?  I originally keep the backups also in a folder on the internal DEE drive 1 TB HD where all my data is kept.  Should you ask, my .IRCAT file is also always on the internal 1 TB HD.  This is the folder with .IRCAT files and Backups that were originally stored on my DEE drive and which now is not permitting me to use:

 Notice that I put an arrow to the latest .IRCAT file which was being used before I had to copy these files to my C: drive (SSD).  The other files there are from previous updates.

My folder on the C: drive (SSD) and that was the only way I could make it work looks like this:

6. Where do you keep your photo backups? What hard drive?  See answer on question 4).  My photos are all kept on the internal DEE drive 1 TB HD where all my data is kept.  The backups of these photos are copied online to my OneDrive Microsoft plan.  When I have too many past years put away on LR, I go passing the older years (through LR) to an external disk.  I have read that one should avoid to get LR too heavy with photos.

Sorry, I sent it in Portuguese because form was all in that language.  Should I have known, I would have written in English to begin.  

I don´t know if it was clear but my original .IRCAT file doesn´t open anymore.  Says it´s corrupt and it won´t be repaired.  So it gave me a tip to try another disk which I did.  And it worked.  I´ve tried all ways to get back to my DEE drive but it just doesn´t work.  And now the one that works won´t delete from the disk the photos in LR.  All I can manage is to delete the photo from LR, but not from the disk.

Thank you GoldingD for giving me a hand on this one!

Here go my answers:

1. What hard drive is your catalog on? Looks like C.  My LR Catalog (.IRCAT file) is originally on my 😧 drive which is an internal HD with 1 TB which is where I keep my data once the C: drive is an internal SSD drive used for booting up the computer with the Windows programs along with all other programs.

2. In that hard drive, how much space in percent (%). Looking for at least 25%:  On my original HD where I had my LR .IRCAT file and backups originally, I have about 550 GB free space.  On my SSD drive which I was now forced to copy LR over to so that it would at least open, I have about 7 GB of free space which is about 7% only.

3. What other hard drives do you have?  I have no other drives.  Just the SSD (102 GB) to boot up the computer (and LR and PS programs) and the 1 TB HD.  Just these two drives.

4. Where do you keep your photos? What hard drive?  My photos are all kept on the internal 😧 drive 1 TB HD where all my data is kept.

5. Where do you keep your catalog backup? What hard drive?  I originally keep the backups also in a folder on the internal 😧 drive 1 TB HD where all my data is kept.  Should you ask, my .IRCAT file is also always on the internal 1 TB HD.  This is the folder with .IRCAT files and Backups that were originally stored on my 😧 drive and which now is not permitting me to use:

 Notice that I put an arrow to the latest .IRCAT file which was being used before I had to copy these files to my C: drive (SSD).  The other files there are from previous updates.

My folder on the C: drive (SSD) and that was the only way I could make it work looks like this:

6. Where do you keep your photo backups? What hard drive?  See answer on question 4).  My photos are all kept on the internal 😧 drive 1 TB HD where all my data is kept.  The backups of these photos are copied online to my OneDrive Microsoft plan.  When I have too many past years put away on LR, I go passing the older years (through LR) to an external disk.  I have read that one should avoid to get LR too heavy with photos.

Thank you GoldingD for giving me a hand on this one!

Some confusion, you stated you tried putting a catalog on a different disk, but your error message refers to your boot drive. We are talking about a different hard drive, not a different folder.

So, inquiry's:

1. What hard drive is your catalog on? Looks like C.

2. In that hard drive, how much space in percent (%). Looking for at least 25%

3. What other hard drives do you have?

4. Where do you keep your photos? What hard drive?

5. Where do you keep your catalog backup? What hard drive?

6. Where do you keep your photo backups? What hard drive?

Took the liberty to use Google Translate, and post the translation, as translation via the community page option was failing (or I am inpatient, as it was taking forever)

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I have a Notebook with Windows 10, Version 21H1 64bit, 16.0GB ram. I use LR Classic Version 10.4. When trying to open it came the message that my catalog is corrupt and would need to be repaired.

I clicked to repair the Catalog but failed. The message came:

I tried the "Choose a different catalog" option, specifically the one from the last Backup. It didn't work either. In the numerous attempts to find a solution, he suggested putting the catalog on a different disk. I opened a folder on my SSD disk that is used to start Windows (the folders with data are on a hard drive that has plenty of space) and the programs although it wasn't a good solution as it's already in a critical space solution

I sent the LR files from the last backup there and tried to start the program there using the .LRCAT file. Opened! However, it doesn't allow me to export LR files to my Photos folder that are in Explorer on HD. I had to resort to saving to the SSD, already quite compromised in space. And finally, I wanted to delete photos from LR but it also doesn't allow me to send to the trash!

I could only delete from LR but remaining in the original folder. Which is also unfeasible as I needed to delete > 2,000 photos!
I ask for help for the community to help me find the problem so that I can use the folder of photos files again, remaining on the HD where I have more space to work.