Good news to report on my Hardinge EZ Vision mill. All issues have been resolved with the simple unplugging and replugging in the I/O plug at the DC150 interface control box. Everything works as it should now. Must have been a poor connection which was giving the error messages. I guess that makes sense too. Can't believe it was something that simple. I was about to have the DC 150 sent to Radwell for trouble shooting.