choice another rate ex rate 1, also you can take a look at cbrgen.tcl and see how that code generate a traffic file, it's simple and not that hard.
________________________________ From: umair shah <meetuas...@yahoo.com> To: nsusers <ns-users@ISI.EDU> Sent: Monday, June 20, 2011 6:02 PM Subject: [ns] cbrgen.tcl nothing is generated umair@umair-VirtualBox:~/ns-allinone-2.34/ns-2.34/indep-utils/cmu-scen-gen$ ns cbrgen.tcl -type cbr -nn 40 -seed 0 -mc 30 -rate 4 >/home/umair/cbrtest.tcl umair@umair-VirtualBox:~/ns-allinone-2.34/ns-2.34/indep-utils/cmu-scen-gen$ ns cbrgen.tcl -type cbr -nn 40 -seed 0 -mc 30 -rate 4 >cbrtest.tcl umair@umair-VirtualBox:~/ns-allinone-2.34/ns-2.34/indep-utils/cmu-scen-gen$ ns cbrgen.tcl -type cbr -nn 20 -seed 0 -mc 16 -rate 4 >cbrtest.tcl umair@umair-VirtualBox:~/ns-allinone-2.34/ns-2.34/indep-utils/cmu-scen-gen$ ns cbrgen.tcl -type cbr -nn 20 -seed 0 -mc 16 -rate 4 > cbrtest.tcl umair@umair-VirtualBox:~/ns-allinone-2.34/ns-2.34/indep-utils/cmu-scen-gen$ ns cbrgen.tcl -type cbr -nn 20 -seed 0 -mc 16 -rate 4 > cbrtest.tcl umair@umair-VirtualBox:~/ns-allinone-2.34/ns-2.34/indep-utils/cmu-scen-gen$ ns cbrgen.tcl -type cbr -nn 20 -seed 1 -mc 16 -rate 4 > cbrtest.tcl umair@umair-VirtualBox:~/ns-allinone-2.34/ns-2.34/indep-utils/cmu-scen-gen$ ns cbrgen.tcl -type cbr -nn 20 -seed 1 -mc 16 -rate 16 > cbrtest.tcl umair@umair-VirtualBox:~/ns-allinone-2.34/ns-2.34/indep-utils/cmu-scen-gen$ ns cbrgen.tcl -type cbr -nn 50 -seed 1 -mc 24 -rate 20 >tst.tcl in all the case nothing is genearated inside the files ,only says invalid sending rate or blank any help?