Hi Filippos,

Did you solve your problem? Can you help me?
I'm trying to get Delay Samples from monitor-queue, with these commands:

set qm [$ns monitor-queue $n1 $n2 $qt 0.5]
set integratorObjectDelay [$qm get-delay-samples]
set delayfila [$integratorObjectDelay set delaySamp_]

but when I run, I get the error:

ns: queueLog: invalid command name ""
    while executing
"$integratorObjectDelay get delaySamp_"
    (procedure "queueLog" line 20)
    invoked from within

According to NS DOC, the object it returns is delaySamp_.

Any clue!?

On 8/6/06, Filippos Kolovos <[EMAIL PROTECTED]> wrote:
> Dear all,
> has anybody used, or tried to use the delaySamp_ object
> that is provided with a queuemonitor object?
> In the manual it states that this object can be used to measure queue delays
> (page 76 of ns-manual).
> It has two methods:
> $queuemonitor get-delay-samples, which says it returns a Samples object
> delaySamp_ to record delays about queues and
> $queuemonitor set-delay-samples <delaySamp_>, is to set up the delay samples
> object to record delay statistics about queues. Also,  it states that
> delaySamp_ is a handle to a samples object, which must have been previously
> created (supposedly with the get-delay-samples method above).
> However I have the following code:
> #Setting a queue-monitor object for a specific queue
> set monitorQueue2_3  [$simulation monitor-queue $node2 $node3 stdout]
> #Setting the integrator for the average queue size - this works ok
> set integratorObject [$monitorQueue2_3 get-pkts-integrator]
> #using the get-delay-samples method of the queuemonitor object to "get" a
> delay samples
> set delaySamples     [$monitorQueue2_3 get-delay-samples]
> #using the set-delay-samples method on, supposedly, the "returned" object to
> set-it up,
> #according to the manual
> $monitorQueue2_3 set-delay-samples delaySamples
> ........
> ........
> more code
> When I simulate the tcl code I get the following error:
> (_o59 cmd line 1)
>     invoked from within
> "_o59 cmd set-delay-samples delaySamples"
>     invoked from within
> "catch "$self cmd $args" ret"
>     invoked from within
> "if [catch "$self cmd $args" ret] {
> set cls [$self info class]
> global errorInfo
> set savedInfo $errorInfo
> error "error when calling class $cls: $args" $..."
>     (procedure "_o59" line 2)
>     (SplitObject unknown line 2)
>     invoked from within
> "$monitorQueue2_3 set-delay-samples delaySamples"
>     (file "simulation-Class-AverageQueue.tcl" line 80)
> What Could be the cause of this? I use ddd as my debugger and I have come to
> the conclusion that the get-delay-samples method does not return anything,
> since
> the delaySamp_ object is initialized to NULL upon initialization of the
> queuemonitor object.
> The code is in the queue-monitor.cc file in <ns-directory>/tools/
> How can one use the delaySamp_ objects of queuemonitor to measure queue
> delays?
> Am I correct, or I am erroneously using these methods?
> Any help would be appreciated.
> Kind Regards,
> -Fk
> --
> Filippos N Kolovos
> Software Systems Analyst & Engineer
> M.Sc. (Eng.) in Data Communications
> Automation & Networking Department
> University of Macedonia Library
> Egnatia 156, P.O.Box 1591
> 540 06 Thessaloniki, Greece
>            [EMAIL PROTECTED]
> Phone: +30-2310-891-826
> ----------------------------------------------

Renata Vidal
"Triste é o destino de quem tenta vencer as batalhas e ter sucesso nos
ataques sem cultivar o espírito da iniciativa (A Arte da Guerra – SUN
TSU – pg 102)"

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