>Is there a way to use a timer (or some other method) to close a report preview screen after a certain length of time?
>
>I use timers on regular screens to release them after an hour of inactivity since I can't get users to close out before leaving work, but I can't figure out how to cope if they leave a report preview up.

Try with

if wexist('Report Designer')
		*set sysmenu to default && Restore standard menu
		release windows 'Report Designer' && try to close report preview window		
	endif

You may want to check Re: Releasing while the Preview Window open Thread #1121802 Message #1121807