[ns] Error, Generating random below 400 for nodement

[TAING Nguon]

Dear all,

I got error when I changed the value of number to be
generated below 400. my code is as below. 

Thanks

Nguon

----------
set god_ [God instance]
set rng [new RNG]
for {set i 0} {$i < 30 } {incr i} {
		
	# set px [$rng integer $val(x)] 
	set px [$rng integer 400 ]
                             ^^^^   
	set py [$rng integer 350 ]
                             ^^^^
	set pz 0 
	$node_($i) set X_ $px 
	$node_($i)	set Y_ $py 
	$node_($i) set Z_ $pz 
	$ns_ at 0 "$node_($i) setdest $px $py 0" 
	$ns_ at 0 "$node_($i) start"; 
}
------------


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