Thanks for your replies. I thing this situation is now resolved, and I’m posting this for closure and maybe for information helping others.
I listened when you mentioned that most ethernet connections occur via a switch and that my peer-to-peer direct connection was non-standard.
Rather than bug Daleen and George, I simply purchsed an ethernet switch and inserted it in the ethernet path between my computer and my CP-4.
I then had an operative ‘magnify glass’ button and selected the only available IP address. Then clicked ‘connect to APver2 Driver’ and got error message.
I then clicked ‘connect to mount’ and was instantly connected to the mount. I had changed nothing else. Everything now seems functional and proper. All seems well.
Clearly, there was somethinbg I had missed.
I will have fun now. Thanks for your help.