XmCommandError(3) on Linux
The text 3a07e69ef04e, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A Command function that displays an error message "XmCommandError" "Command functions" "XmCommandError"