[ns] help me

[mohamed saad]

salam alikom

 after i wrote "example1.tcl" program as

set ns [new simulator]
          .
          .
$ns run

 i run the program by type "ns example1.tcl" command
it give error message
           invalid command name "simulator"
           while executing
          "simulator create_03"
            invoked from within
              .
              :
what is wrong in this program?
and what i do?
note i work in mandrake10
can you help me
gazak allah khiran

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