[ns] FW: FLOATING POINT EXCEPTION

[Diana Benitez]

From: paraguayita_69 at hotmail.comTo: ns-users at isi.eduSubject: FLOATING POINT EXCEPTIONDate: Mon, 5 Jan 2009 21:13:25 -0500

Hello: I am trying to run a XCP protocol example script as follows: ----------------------------------------------
### XCP EXAMPLE TCLset lrate 0.0Queue/XCP set tcp_xcp_on 1Agent/TCP set minrto_ 1set ns [new Simulator]$ns color 1 Redset tr_f        [open out.tr w]set nam_f       [open out.nam w]set record_f1    [open out.data1 w]$ns trace-all $tr_f$ns namtrace-all $nam_f### Finish procproc finish {} {     global ns tr_f record_f1 nam_f      $ns flush-trace     close $tr_f     close $record_f1     close $nam_f     exec awk { { print $1, $2 } } out.data1 > temp1.cwnd     exit 0}set n0 [$ns node]set n1 [$ns node]#### LINK#   object      from  to  bandwith   delay    queue    $ns duplex-link $n0  $n1    5Mb      35ms     XCP#### BOTTLENECK BUFFERset buffer 43# tamanho del buffer del link n1-n2$ns queue-limit $n0 $n1 [expr $buffer *1]$ns duplex-link-op $n0 $n1 queuePos 0.5#### TCP AGENT 1set tcp1 [new Agent/TCP/Reno/XCP]$ns attach-agent $n0 $tcp1set sink1 [new Agent/TCPSink/XCPSink]$ns attach-agent $n1 $sink1$ns connect $tcp1 $sink1$tcp1 set fid_ 1$tcp1 set window_ 8000$tcp1 set packetSize_ 552set ftp1 [new Application/FTP]$ftp1 attach-agent $tcp1$ftp1 set type_ FTP### Record procproc record {} {    global ns tcp1 sink1 record_f1      set now [$ns now]    set time 0.15    set cwin1     [$tcp1 set cwnd_]    puts $record_f1 "$now [expr $cwin1*1] "    $ns at [expr $now+$time] "record "}$ns at 0.0 "record"$ns at 0.0 "$ftp1 start"$ns at 20.0 "$ftp1 stop"$ns at 20.0 "$ns detach-agent $n0 $tcp1 ; $ns detach-agent $n1 $sink1"$ns at 20.0 "finish"$ns run----------------------------------------------
 
I got the NS2 version 2.33 installed in Fedora 8. I have no problems with others TCP protocols. The exception normally appears when there is a division by zero. However, in the .tcl code there is nothing that can be associated with this error. How Can be this possible? Can someone help me?
 
THANKS in advance
 
DIANA 

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