[ns] "catch "$self cmd $args" ret" error means

set ns [new Simulator] #Open the nam trace file set nf [open out.nam w] $ns namtrace-all $nf #Open the Trace file set tf [open out.tr w] $ns trace-all $tf #Define a 'finish' procedure proc finish {} { global ns nf tf $ns flush-trace #Close the trace file close $n

[ns] error "error when calling class $cls: $args" $..." , , , , means???

set ns [new Simulator] #Open the nam trace file set nf [open out.nam w] $ns namtrace-all $nf #Open the Trace file set tf [open out.tr w] $ns trace-all $tf #Define a 'finish' procedure proc finish {} { global ns nf tf $ns flush-trace #Close the trace file close $n

[ns] "_o3 cmd configure-ldp-on-all-mpls-nodes" error means

set ns [new Simulator] #Open the nam trace file set nf [open out.nam w] $ns namtrace-all $nf #Open the Trace file set tf [open out.tr w] $ns trace-all $tf #Define a 'finish' procedure proc finish {} { global ns nf tf $ns flush-trace #Close the trace file close $n