Hoping to find another fellow minidisk user here. My Sony MD player has started to give the C13 error message whenever I load a copied MD. It cant even read the TOC. From the manual, it suggests to delete the song on that MD and try again but that does not make sense because it cant evenr ead the TOC, let alone delete the tracks. Tried with other MDs as well but to no avail. The confusing part is that, its OK when I load an original MD. IT can read the TOC and play as usual. Before I send it for servicing at Sony, does anyone have any idea why this is happening?