FCPX HELP - The operation couldn’t be completed. Permission denied. “Library Name” is already in use by “name” on “name-imac.local”.

Quit FCP if it is running.

In the Finder, control-click the affected library and choose Show Package Contents.

Press Command-Shift-period to have Finder show hidden files.

You should see one folder and two files with names starting with .lock

Drag them to the trash, but don’t change anything else inside the library.

Close the contents and double-click the library to open in FCP.

Did you first quit FCP?

If the library is on an external drive, try Get Info on the drive and enable "Ignore ownership on this volume."

If it's not on an external drive, try Get Info on the .lock files and see if you can change your privileges to Read & Write.

Yes, I quit FCP. It's on an external drive, and "Ignore Ownership" is checked. Thanks for the reply, though.

And thank you, Luis. The info on the drive says "Mac OS Extended".

It won't move anything from the FCPX library; it just copies it. I also can't delete anything from the library.

I'm using FCPX 10.6.5; my machine uses Big Sur, 11.7.

Get Info on the library .fcpbundle file and post a screenshot.

Right-click the library .fcpbundle file and choose Show package contents. Then as Luis instructed, press Command-Shift-. to show hidden files.

Get Info on a .lock file that you can't delete and post a screenshot.

Something seems to be very wrong. The Get Info says the library is about 500 GB (by the way, this is a big indication that you should probably delete generated files, and also consider using external media).

Finder lists the library as being only 16 bytes.

It seems to me that there is some corruption in this drive.

I'd make sure to have copies somewhere else, to begin with; then use Disk Utility to try and verify and repair this drive.

Yes, this is about 80 hours of work, jammed up here. I identified the problem files, but can't delete them, for some reason. I've copied some of the files, but it's the FCP projects... a major gig for me. If I could copy the library to another external drive I could re-format this one. So, I'd like to be able to clone some projects instead of creating them from scratch. Is there any way to unlock the library, which has a few corrupted files?

I would copy the whole thing to a different drive first.

Then if FCP can open this copy, I'd change the library media location to a folder on that same new drive, and consolidate that media outside the library. It is fine to have media inside the library if it is relatively small, but in most cases I'd recommend working with external media.

Thanks for everyone's help! I solved my problem, mostly.

Here is what I did:

I had an earlier version of my library, created when there was an issue and FCPX created one. I copied it to another drive, as the latest version of the library wouldn't let me copy the whole library.

I replaced files in the earlier version with all the uncorrupted files from the problem library, and this worked. Then I duplicated the "working" "updated" library on another drive, for safety, and deleted the problem library, and re-formatted the drive it was on.

This took a long time to copy, but now I've got a nearly-complete library, without the corrupted files, and it seems to work just fine.

I determined which were the corrupted files by copying each folder that would copy, and looked into the ones that wouldn't. All the corrupted files displayed "zero bytes" of memory (not sure everyone's corrupted files will display this way). The corrupted files were all in "Render Files" (some were in "High Quality Media" and some in "Thumbnail Media" folders in the "Render Files" folder).

I've been using FCPX for more than a decade, but don't grasp "consolidate the media outside the library." I suppose I need to watch a tutorial. But for now, I'm back in action.

Thanks again!

I am glad that you were able to work it out.

Your solution reminded me that it's a good idea to periodically delete render files. They are often unnecessarily and can accumulate. There's a chance that a big part of that large library was composed of render files.

Yes, "Ignore ownership on this volume" is and has been checked.

This didn't work for me. I am using FCPX 10.6.5

The program will not let me move the files beginning with ".lock". I can copy, but can't send to trash.

I found the bad files, but can't delete them.

How is the drive formatted? It should be HFS+ or APFS.

Is FCP running? Quit FCP before attempting to delete those files. What exactly happens when you try to move to trash?

Select the drive in the Finder and press Command-I to open the Info window.

At the bottom, is "Ignore Ownership on this Volume" checked? If not, check the box and see if it helps.

Yes, "Ignore ownership on this volume" is and has been checked.

Error message when I try to copy: "The Finder can’t complete the operation because some data in “Tuesday Long Video Library” can’t be read or written.

(Error code -36)"