[ns] How to introduce an error model between two mobile nodes

[Anuradha Jain]

I tried something like this, but it gives me an error.

set em [new ErrorModel]

$em set enable_ 1
$em unit pkt
$em set bandwidth_ 5M
$em ranvar [new RandomVariable/Uniform]
$em drop-target [new Agent/Null]


$ns link-lossmodel $em $node_(0) $node_(1)

Where node_(0) and node_(1) are mobile nodes. 

Thanks,
Anu