Clear and rescan failure

I've been tidying up my library and have been re-ripping and re-storing my cds. Having completed the exercise I have chosen to clear and rescan, but it is interrupted each time. The error in the scanlog is shown as

[12-11-10 16:08:23.3082] main::main (200) Starting Logitech Media Server scanner (v7.7.2, r33893, Wed Mar 14 05:47:42 PDT 2012) perl 5.014001
[12-11-10 16:08:25.0426] Slim::Schema::forceCommit (2118) Warning: Trying to commit transactions before DB is initialized!
[12-11-10 16:08:32.5116] Slim::Music::Import::runImporter (485) Starting Slim::Media::MediaFolderScan scan
[12-11-10 16:08:32.5134] Slim::Utils::Scanner::Local::rescan (171) Discovering audio files in D:\new music folder
[12-11-10 16:08:52.0521] Slim::Utils::Scanner::Local::__ANON__ (254) Removing deleted audio files (0)
[12-11-10 16:08:52.0531] Slim::Utils::Scanner::Local::__ANON__ (332) Scanning new audio files (7613)
[12-11-10 16:12:04.3062] Audio::Scan::scan (64) Warning: Error: Unable to read at least 631 bytes from file.

And the server log shows this

[12-11-10 15:44:00.5724] Slim::Networking::IO::Select::__ANON__ (147) Error: Select task failed calling Slim::Web::HTTP::sendStreamingResponse: illegal file descriptor or filehandle (either no attached file descriptor or illegal value): at /<C:\PROGRA~1\SQUEEZ~1\server\SQUEEZ~3.EXE>Slim/Networking/IO/Select.pm line 150.
; fh=Slim::Web::HTTP::ClientConn=GLOB(0x9f9ce7c)


Can anyone offer me any suggestions?

thanks in advance