you can see wireless2.tcl to found nam running codes. and add those codes to your script.
for define it:
set namtrace [open wireless2-out.nam w]
$ns_ namtrace-all-wireless $namtrace $val(x) $val(y) ( x & y defined
above)
and in "proc stop{}" after "close $namtrace" add this:
exec nam wireless2-out.nam &
exit 0
( "wireless2-out" is name of nam file that defined)
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