183) Should I have a cascade button without a submenu in a pulldown

menu?

Answer:  No. This is forbidden by the style guide. Technically you can do it
(see previous question) but if you do it will not be Motif style compliant.
This is unlikely to change - if a "button" is important enough to be in a
pulldown menu bar with no pulldown, it should be a button elsewhere.  (Mind
you, you won't be able to put accelerators on it elsewhere though.)