Seems to me like a simple problem, but can't figure this out and have not seen any posts dealing with this issue.  When I use the built-in editor in R.app, I am unable to execute a command using the <command>-<enter> shortcut.  Nor am I able to execute commands by selecting the "execute" option in the Edit menu.  If I press the <command>-<enter>, the Edit menu flashes in the menu bar, as if it were trying to execute, but nothing happens. I can source an entire file using the <command>-e shortcut, and complete text with the ^. stroke, but no execution.  Am I missing something?

system: 
MacBook Pro
OSX 10.4.10
R version 2.5.1,  GUI version 1.20
(binary installation)

cheers,
John


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