doubt regarding tcl script

while running my tcl script it shows following error how to resolve this
error please anyone help me friends
thanks in advance




















*num_nodes is set 25INITIALIZE THE LIST xListHeadns: _o171 rushingattack1:
    (_o171 cmd line 1)    invoked from within"_o171 cmd rushingattack1"
invoked from within"catch "$self cmd $args" ret"    invoked from within"if
[catch "$self cmd $args" ret] {set cls [$self info class]global
errorInfoset savedInfo $errorInfoerror "error when calling class $cls:
$args" $..."    (procedure "_o171" line 2)    (SplitObject unknown line
2)    invoked from within"_o171 rushingattack1"*





*jothimani*