I get this one frequently and am wondering why. I frequently will d/l CDLC without DDC (or not the amount of DDC that I would like) and add my own using the toolkit. Running Win 7 sp1 Using up to date toolkit (updated today) Unpack CDLC Switch to DDC tab Add CDLC tracks (lead, rhythm, etc.... all but vocals and showlights) Phrase length 4 Remove sustain and overwrite original - generate (Usually this goes smoothly) Go to pack/unpack tab Select update sng Click pack Choose folders/CDLC This error shows up... Packing Error: End of stream reached with 4 byte left to read (Its always 4 byte....) So I then uncheck the update SNG and it usually works for packing. I cant recall if the song actually shows up so I will be more vigilant in the future. What is this all about? I cannot find what SNG is either... Once again - thanks for the help....love the work you are getting done here!