Michael,

A few questions to help clarify...

-What version SW are you running?
-Is the content on a SCSI drive?
- Have you installed anything new? copied new files over? install OS updates? etc.....

It is probably worth cleaning up the content drive to rule it out (called "zeroing").

Move all your content over to another safe storage location as you will be wiping the entire content drive clean. All your files will be lost permanently if not backed up!!!

To zero a content drive:
1. Launch Disk Utility from Macintosh HD > Applications > Utilities.
2. Choose the technical description of the content drive on the left pane.
3. Click the Erase tab and the Options button that is active on the Erase tab.
4. Select Zero All Data.
5. Type the name of the drive (in lieu of "Untitled") and click OK.
The zero process can take up to an hour for a 140 GB hard disk. You may be prompted for a username and password following a zero process.


When this is done you can copy all your content back over to the drive, then launch Catalyst and check that the library is set to "look" in the proper location for your content. Re-scan the library and you're done!

Hope this helps