[ns] Need help with add-route-to-adj-node

[Rafiq Shaikh]

Hi All,

I am trying to add manual route entry to the node_(3) as below:
$ns rtproto Manual
$node_(3) add-route-to-adj-node -default $node_(1)

It gives me an error as below. I am new to NS-2 so can't understand what this 
means:
    (_o68 cmd line 1)
    invoked from within
"_o68 cmd add-route-to-adj-node -default _o32"
    invoked from within
"catch "$self cmd $args" ret"
    invoked from within
"if [catch "$self cmd $args" ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error "error when calling class $cls: $args" $..."
    (procedure "_o68" line 2)
    (SplitObject unknown line 2)
    invoked from within
"$node_(3) add-route-to-adj-node -default $node_(1)"
    (file "./cp-1" line 11)
    invoked from within
"source.orig ./cp-1"
    ("uplevel" body line 1)
    invoked from within
"uplevel source.orig [list $fileName]"
    invoked from within
"if [$instance_ is_http_url $fileName] {
set buffer [$instance_ read_url $fileName]
uplevel eval $buffer
} else {
uplevel source.orig [list $fileName]
..."
    (procedure "source" line 8)
    invoked from within
"source $val(cp)"
    (file "w.tcl" line 117)


I think I typed the command as mentioned in the NS-2 manual.
Any idea why this error is coming?

Regards,
-Rafiq.