I uninstalled and reinstalled all of the printers. I still get this error message:
The server myservername may not exist or it is unavailable at this time. Check the server name or IP address, check your network connection, and then try again."
I did change the name of the server, which was the machine from which I transferred my user settings and data. But my printer shouldn't need to connect to a server whenever I want to change a print setting.
I remain baffled by this problem.