[ns] large-scale wireless simulations

[Sagnik Bhattacharya <sagnik@cs.virginia.edu>]

I am trying to run a large-scale wireless simulation wih about a 1000
nodes. To reduce the memory footprint and the running time, I tried to
remove packet headers from my simulations. I found a posting on the
list which said that I should include LL Mac ARP RTP. Here is what I did :

remove-all-packet-headers
add-packet-header DSDV nocache LL Mac ARP RTP IP
set ns_         [new Simulator]

"nocache" is the name of my agent. Here is the error I get when I run my
script :
can't unset "tab_(PacketHeader/Pushback)": no such element in array
    (Object unset line 2)
    invoked from within
"PacketHeaderManager unset tab_($cl)"
    (procedure "remove-all-packet-headers" line 4)
    invoked from within
"remove-all-packet-headers"
    (file "cache.tcl" line 99)

Does anyone have suggestions as to what I am doing wrong?

Sagnik