[ns] getting queue length problem

[k s]

Hi ,

I saw a similar issue on
http://mailman.isi.edu/pipermail/ns-users/2003-January/028599.html

for accessing the length of the ifq in mac.  I did their fix (see the post
above) but it still doesn't work for me.  I still get a seg fault when the
program comes to 

int queueLen= ll_->ifq()->length();


It's in a couple of "if" statement for null pointers...
if (ll_!=NULL){ //if the ll_ pointer is set 
			if(ll_->ifq()!=NULL){ //if the ll_->ifq_ pointer is
set
				int queueLen= ll_->ifq()->length();
			}
}

So that can't be the problem... I'm stuck!

Can anyone help me out?

Kathy