Projects and Events require read write permission

When opening a library on an external drive in Final Cut Pro X (10.1.3), I receive the error message: The document "Current" could not be opened. Projects and Events require read and write permission. (My library is called Current).

The strange thing is, is that I have another library on that same external drive that opens up just fine in Final Cut Pro X. I have tried using it on a different computer, trashing FCP preferences and reinstalling FCP. I also have Ignore Ownership for the volume ON.

Anyone who can help's advice would be much appreciated.

Fred.

MacBook Pro (13-inch Mid 2012), OS X Yosemite (10.10.3)

Did you drag the library onto the drive from a Time Machine vault?

Hi Fred
Permissions are a system level operation. You can change permission on the library in question to allow you to read write and you should be good to go. Not sure why you don't have RW permissions already, unless you created this library as another user or as Tom says you added it from a protected source or brought it in from another computer, etc…

First in order to change the RW permissions, you need to be an administrator and have that password.
In the Finder, navigate to the library you need to access. Highlight it and use "Get Info" or the command key + I, or right click and then select "Get Info".
An Info window will open, and at the bottom you will see a lock icon in the lower right corner. Click that and a pop up window will appear for "Finder wants to…" with a name and password fields. Enter an administrator name and password. The lock icon will change to an open lock icon.

Now if your name appears in the list of users but with read only, then click on the double arrows and change to Read & Write. Click the lock and you now have permission to Read and Write.

If your name is not in the User access list, click the "+" button lower left, and click on your name from the list that will pop up, change the permission level to "Read & Write" then click on the lock icon and you are done. If indeed you want this file to be open to everyone, add that and RW level permissions.
Happy editing

Hope this helps, Greg

p.s. this will work for changing permissions for files, folders, and drives. It is a Unix thing.
If you brought the file in after applying "Ignore ownership" it may still retain the user permissions.
Will not work on an encrypted file or drive tho, you need the encrypted user file password to open encryption protected files.