When you have these file i/o errors, it displays the name of the file ?
If so, you can try to move these files out of the biab directory, then run the build of the songlist again.

Is it an old computer ? Maybe your hd is tired ? Check your windows events watcher to see if your disk is damaged.

At last, you can try my BiabExplorer to display the songs.


Free tools for Biab:
Biab Scales and BIArpeggio to practice scales/arpeggio
Biab Explorer: the other song picker