Re: [ns] Reg: error given by the prog.

[Lloyd Wood <l.wood@eim.surrey.ac.uk>]

On Tue, 24 Oct 2000, Puneet Agarwal wrote:

> It seems that there is some problem with new "Application/Traffic/CBR",
> on my machine (ns-2.1b6 on Linux), when I replaced it with old "Agent/CBR", your
> program worked.

This is because you can can't attach an application directly to a
node. Connect the CBR application to a UDP agent and attach that to a
node, and you're all set. Agent/CBR is old and dates from before the
the agent/application separation.

L.

> so change
> 
> "set cbr0 [new Application/Traffic/CBR]"
> 
> back to
> 
> "set cbr0 [new Agent/CBR]"
> 
> Puneet
> 
> ----- Original Message -----
> From: "preethi sam" <preethisam@hotmail.com>
> To: <ns-users@ISI.EDU>
> Sent: Tuesday, October 24, 2000 1:57 PM
> Subject: [ns] Reg: error given by the prog.
> 
> 
> Hi ,
>   this is a simple prog that creates a topology having 2 nodes sharing  a
> duplex link between them but it gives the foll error:
> 
> (_o34 cmd line 1)
>     invoked from within
> "_o34 cmd reset"
>     invoked from within
> "catch "$self cmd $args" ret"
>     (procedure "_o34" line 2)
>     (SplitObject unknown line 2)
>     invoked from within
> "$a reset"
>     (procedure "_o10" line 5)
>     (Node do-reset line 5)
>     invoked from within
> "$self do-reset$nodetype_"
>     (procedure "_o10" line 4)
>     (Node reset line 4)
>     invoked from within
> "$Node_($nn) reset"
>     (procedure "_o3" line 11)
>     (Simulator run line 11)
>     invoked from within
> "$ns run"
>     (file "simnode.tcl" line 32)
> 
> 
> /* program */
> 
> set ns [new Simulator]
> ns-random 0
> set nf [open outtry.tr w]
> $ns trace-all $nf
> 
> set n0 [$ns node]
> set n1 [$ns node]
> 
> $ns duplex-link $n0 $n1 1Mb 10ms DropTail
> 
> set cbr0 [new Application/Traffic/CBR]
> $ns attach-agent $n0 $cbr0
> $cbr0 set packetSize_ 500
> $cbr0 set interval_ 0.005
> 
> set null0 [new Agent/Null]
> $ns attach-agent $n1 $null0
> 
> $ns connect $cbr0 $null0
> 
> $ns at 0.5 "$cbr0 start"
> $ns at 4.5 "$cbr0 stop"
> 
> proc finish {} {
>   global ns nf
>   $ns flush-trace
>   close $nf
>   exit 0
> }
> 
> $ns at 5.0 "finish"
> $ns run
> 
> 
> please let me know what the error means...
> 
> Preethi.
> 
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<L.Wood@surrey.ac.uk>PGP<http://www.ee.surrey.ac.uk/Personal/L.Wood/>