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Define command question

	I have been trying to get a simple Program Framework put together,
and have run into an annoying thing.  The problem is that I have a flavor,
called Scenario-Flavor, that I want to have commands operate on.  So, I
define a command for my frame that accepts an instance of this flavor, and
since there is a pane with all of the available ones listed, this works
fine as long as you do something like:
    Framework Command: Examine Scenario <mouseclick>
BUT, if you hit two spaces after the word scenario, I get a line below the
command line that says "End of file for #<window description>", and if I
hit anything else, it gets into an infinite loop with this text flashing
below the line.  I'm doing this under 7.1, but 7.2 gives a similar message,
without the infinite loop.
	The command definition just asks for an instance of the flavor,
and I've defined a sys:print-self method for the flavor.
	Anybody know what I can do to avoid this?  Obviously, it's not an
error one sees with the regular commands.
	chris sterritt