[SOLVED] namtrace error in ns2

When I try to run ex1.tcl file, I get the following error:

rita@rita-S400CA:~/Desktop$ ns ex1.tcl
can't read "namtrace": no such variable
while executing
"$namtrace-all $nf"
(file "ex1.tcl" line 3)


ex1.tcl file contains:

set ns [new Simulator]
set nf [open out.nam w]
$namtrace-all $nf
proc finish {} {
global ns nf
$ns flush-trace
close $nf
exec nam out.nam &
exit 0
}
set n0 [$ns node]
set n1 [$ns node]
$ns duplex-link $n0 $n1 1Mb 10ms DropTail

$ns at 5.0 "finish"
$ns run

Any solution to this error?

* http://www.isi.edu/nsnam/ns/tutorial/nsscript1.html
"example1.tcl" http://www.isi.edu/nsnam/ns/tutorial.../example1a.tcl

#Create a simulator object
set ns [new Simulator]

#Open the nam trace file
set nf [open out.nam w]
$ns namtrace-all $nf

#Define a 'finish' procedure
proc finish {} {
        global ns nf
        $ns flush-trace
	#Close the trace file
        close $nf
	#Execute nam on the trace file
        exec nam out.nam &
        exit 0
}

#Create two nodes
set n0 [$ns node]
set n1 [$ns node]

#Create a duplex link between the nodes
$ns duplex-link $n0 $n1 1Mb 10ms DropTail

#Call the finish procedure after 5 seconds of simulation time
$ns at 5.0 "finish"

#Run the simulation
$ns run

Thanks a lot.

Originally Posted by knudfl * http://www.isi.edu/nsnam/ns/tutorial/nsscript1.html "example1.tcl" http://www.isi.edu/nsnam/ns/tutorial.../example1a.tcl #Create a simulator object set ns [new Simulator] #Open the nam trace file set nf [open out.nam w] $ns namtrace-all $nf #Define a 'finish' procedure proc finish {} { global ns nf $ns flush-trace #Close the trace file close $nf #Execute nam on the trace file exec nam out.nam & exit 0 } #Create two nodes set n0 [$ns node] set n1 [$ns node] #Create a duplex link between the nodes $ns duplex-link $n0 $n1 1Mb 10ms DropTail #Call the finish procedure after 5 seconds of simulation time $ns at 5.0 "finish" #Run the simulation $ns run