TuneUp accesses your "iTunes Library.xml" file in order to read and make changes to your music library. If this file becomes corrupted, TuneUp may display the "some tracks were not found in your music collection" error message when attempting to clean your music.
Please follow the instructions to try rebuilding your music library:
(Note: Apple suggests that you may want to back up your iTunes library, playlists, and iTunes Store purchases before rebuilding your library. Please visit the following website for specific instructions on how to do perform a back up: How to backup your library)
1.) Quit iTunes
2.) Locate your iTunes folder (this is the folder that contains the iTunes Library and iTunes Library.xml files).
- Mac OS X: Users > [your username] > Music
- Microsoft Windows XP: Documents and Settings > [your username] > My Documents >My Music
- Microsoft Windows Vista: Users > [your username] > Music
- Microsoft Windows 7: Users > [your username] > My Music
3.) Open your iTunes folder.
4.) Drag the "iTunes Library.xml" or "iTunes Music Library.xml" file to the Desktop.
5.) Open iTunes.
Important: Do not add any content into iTunes at this point (such as by purchasing something from the iTunes Store).
6.) Choose File > Library > Import Playlist.
7.) Navigate to the "iTunes Library.xml" file on the Desktop.
Mac users: Click Choose.
Windows users: Click Open.