How to get editres to work?

[gtackett]

I'm using XQuartz 2.8.1 ((xorg-server 1.20.11) on MacOS 10.14.6. I'd like to use editres to run down a question about resource names used by xterm, but I can't get any X application to work with editres, except for editres itself, let alone xterm.

I select Command->Get Tree from the editres menus, then click on the window of an X application like xterm.

editres says "Message sent to client asking for widget tree", then, eventually, "It appears this client does not understand the Editres Protocol."

This is the same, no matter what X application I try it with. Thomas Dickey, xterm's maintainer, says that xterm should automatically support editres, since xterm uses Athena widgets.

I tried adding *editresBlock: none to my .Xresources but that had no effect.