That error means the machine thinks the OPC area is full (an area next to the hub for pre-recording tests done every time a recordable disc is loaded, and it stores/accumulates test results there). You could try cleaning the disc with a little liquid dish soap and water and soft cloth to see if that area is dirty... or you might have used the problem disc(s) so long that that OPC area is really filled up (but that takes lots of loads).
Try the disc cleaning first, then we can go from there?
Thanks for the reply wajo. When it started I could play the disc for a few minutes and then it woul erase it. Today I decided to break down and clean it assuming that was the problem. I don't think I messed it up because everything else seems to work. I tried cleaning one of the discs. It didn't help. Maybe I need new ones. There are 20 in this pack that have all been used more than 200 times each.
Some RW discs in certain systems and circumstances will "fail" after many uses if you ERASE or FORMAT them to get rid of old titles.
People have had much longer RW life by DELETING titles rather than ERASE or FORMAT, which appears to be harder on the rewriteability of RW discs (based on user reports).
Thanks for your help wajo. It is much appreciated.