I am using version 3.318, but I think the list may be truncated and I am not seeing the full line. Cannot open the window more so this is only a guess.
Over the many years, since 70's, I have never paid too much attention to the specific type of device as I assumed the address protocol was common to all devices. Now I see that at least as far as the CM15A is concerned it is fussy about the specific device. Good to find that out before I expire this vale of tears.
Thanks to the group for your interest and suggestions.
John