monitor-queue questions

[damon]

Biaz Saad wrote:

>>What is the status of create-trace ? I am tring to trace only
>>drops between nodes $r and $k$. While I am sure that I have drops
>>(by using $ns  trace-queue     $r      $k        $f), I get an empty file
>>with the following instructions :
>>set f [open saad.tr w]
>>$ns create-trace Drop $f $r  $k
>>Does anyone have a clue ?I seem to be getting the same results...  Is this
a bug?
I also tried creating a trace of type Enque and Deque to no avail...

I even tried this ...

set i  [open d.out w]
set p [new Trace/Enque]
$p set src_ $n0
$p set dst_ $n1
$p attach $i

alas, an empty file every time...

Damon