Hi Soares, Try writing "simulator" with capital "S" instead of small "s".
Try this tutorial for your first experience. Run the examples in it. They'll help you get used to the simulator. http://www.isi.edu/nsnam/ns/tutorial/ Kind regards, Nicholas Mbonimpa On Wed, Aug 31, 2011 at 7:46 AM, Bety Barreto Soares <betyb...@yahoo.com>wrote: > > > > > # myfirst_ns.tcl > # create a simulator > set ns [new simulator] > > create a trace file > set mytrace [open out.tr w] > $ns trace-all $mytrace > > create a NAM trace file > set myNAM [open out.nam w] > $ns namtrace-all $myNAM > > define a procedure finish > proc finish {} { > global ns mytrace myNAM > $ns flush-trace > close $mytrace > close $myNAM > exec nam out.nam & > exit 0 > } > > create nodes > set n0 [$ns node] > set n1 [$ns node] > set n2 [$ns node] > set n3 [$ns node] > set n4 [$ns node] > > connect nodes with links > $ns duplex-link $n0 $n2 100Mb 5ms DropTail > $ns duplex-link $n1 $n2 100Mb 5ms DropTail > $ns duplex-link $n2 $n4 54Mb 10ms DropTail > $ns duplex-link $n2 $n3 54Mb 10ms DropTail > $ns duplex-link $n3 $n4 10Mb 15ms DropTail > $ns queue-limit $n2 n3 40 > > create a UDP agent > set udp [new Agent/UDP] > $ns attach-agent $n0 $udp > set null [new Agent/Null] > $ns attach-agent $n3 $null > $ns connect $udp $null > $udp set fid_1 > > create a CBR traffic source > set cbr [new Application/Traffic/CBR] > $cbr attach-agent $udp > $cbr set packetSize_1000 > $cbr set rate_2Mb > > create a TCP agent > set tcp [new Agent/TCP] > $ns attach-agent $n1 $tcp > set sink [new Agent/TCPSink] > $ns attach-agent $n4 $sink > $ns connect $tcp $sink > $tcp set fid_2 > > create an FTP session > set ftp [new Application/FTP] > $ftp attach-agent $tcp > > schedule events > ns at 0.05 "$ftp start" > ns at 0.1 "$cbr start" > ns at 60.0 "$ftp stop" > ns at 60.5 "$cbr stop" > ns at 61 "finish" > } > > # Start the simulation > $ns run > > ON THE CYGWIN I RUN THE FILE > $ ns myfirst_ns.tcl > > IT'S ERROR SHOW BELOW > > > $ myfirst_ns.tcl > invalid command > name "simulator" > while executing > "simulator > create _o3" > invoked from > within > "catch"$className > create $o $args" msg" > invoked from > within > "if [catch > "$className create $o $args" msg] { > if [string match > "_FAILED _SHADOW_OBJECT_"$msg] { > delete $o > return"" > } > global errorInfo > error "class > $.." > <procedure "new" line 3> > invoked from > within > "new > simulator" > invoked from > within > "set ns [new > simulator]" > <file > "myfirst_ns.tcl" line3> > > > > > How to solve this?please help me out..i’m > very new > >
