Hello to the list, > So I wonder...did anyone on the list do any trials or do you have knowledge > of such methods?? > Or is there another way? Yes, I erased a plastic 16c58 twice. We have an CO60 gamma atomic beam sourcer and I put there a programmed IC. There was about 1-2 hours in it and it was totally erased but unfortunetelly I can't repogram because there was a programing filure after erasing. I tried to erase once more it was succesfull but I can't reprogram too. I think the program memory is damadged. Cheer George