Amy, it usually means that you have copied a file other than an MP3 file directly to the card instead of sending it to the machine via the Transfer Tool. Next time you get that error, send that file to the unit via the Transfer Tool instead of copying it directly and see if that doesn't fix the problem. Jeremiah -----Original Message----- From: bookport-bounce@xxxxxxxxxxxxx [mailto:bookport-bounce@xxxxxxxxxxxxx] On Behalf Of Amy Ruell Sent: August 17, 2004 8:49 To: bookport@xxxxxxxxxxxxx Subject: [bookport] Unfiltered files error Hello Aph and Listers, I sometimes get a "cannot read unfiltered files" when putting a compact flash into the book port. What does this mean? Thanks. Amy