Deliberately to force a audio error message make of course only sense for trying out the method for "reanimating" lost material. Yes, it happened already twice to me . That's the reasen why I desperately was looking for a way to get access to lost material. First time, my RH1 obviously failed with "TOC-writing" after I pressed the T-Mark button. After that I had lost the last 5 recorded peaces. Next time (two days later) I lost more than 7 hours of music during naming peaces in SonicStage. I suddenly had the error message, (in SS) that the MD "is not formated as audio-disc" (or something like this). I had no more audio-access to the recorded material neither by SS nor by the RH1 directly. It was obvious again to me, that there would have been some sort of failure by writing the "TOC-files". Though the final solution as reported, in the end seems to be quite simple, it took me many hours get the right way. Especially the point to use a totally fresh formated MD was the crux. I hope, that somebody else will try now "my solution", because I am eager to know, wheter the solution is reproducable. Though I tried many times. EDIT: But now a question. Overwriting the ATDATA file is only possible, if you safed it earlier, no? Or do you mean, that you have some sort of error, copy the ATDATA file to harddisc and overwrite the ATDATA file of the MD with this copied fiel?