[ns] multiple flows

[Apu Kapadia <akapadia@uiuc.edu>]

I'm observing something weird with tcp flows. I set up a flow monitor and
I label the tcp flows from 1 to n (for n flows). I print out the
statistics for each flow in my finish procedure. For many values of n, I
get an exception when I try to do the following:

        set flowmon_id [lindex $flowmon $i]
	puts $dropfile "[$flowmon_id set pdrops_]

It seems that the first line returns a null string, and hence an exception
is thrown in the next line. I'm able to get stats for number of flows =
1,4,5,6,8,10,12,30, etc. (seems arbitrary to me), but for many other
values of total flows I get an exception.

Is this a bug?

Regards,
Apu