[ns] Cannot assign cost to links

[Ann Monico <packetdata@yahoo.com>]

Hi

I'm having problem in assigning link cost for the
links.Say for a simple
case of 3 nodes 0,1 and 2 I'm doing the following

set link1 [$ns simplex-link $n0 $n2 1Mb 10ms DropTail]
$link1 cost -10
set link2 [$ns simplex-link $n0 $n1 1Mb 10ms DropTail]
$link2 cost -10

While it works for the 1st link, for any subsequent
links it gives the
following problem:

invalid command name "_o24 _o34"
    while executing
"$link2 cost -10 " 


This command name "_o24 _o34" concatenates as more
link objects are added.

I'm very badly stuck, any help is appreciated. 

-ann       


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