[ns] multiple output files.

["K.R. Anupama" <anupkr@bits-pilani.ac.in>]

Hi!
  i would like to open multiple output files at different time periods of
the simulation i tried the following code

proc next {file name}
       global ns_ traceid_
       close $traceid_
	set traceid_ [open $filename w]
	$ns_ trace-all $traceid_
}
at 240.0 "next" $newtracefile

but my output file is empty.
where did i go wrong.
could some one help me out

anupama