Sifu Owen has resolved my problem ... though in a different manner ..
The button_OnClicked Event function was defined as a command (SUBR)
ie:
(DEFUN C:KDUB_CommandCenter_Form_B01_OnClicked (/) (c:KDUB_Steel_Main))
If changed to a function (USUBR) , the last registered
command completed is c:KDUB_Steel_Main not the event trap, allowing for ENTER to repeat the command.
ie:
(DEFUN KDUB_CommandCenter_Form_B01_OnClicked (/) (c:KDUB_Steel_Main))
.. hope that explanation is understandable