unless( $evaluator = $memory{"Evaluator_$args{alias}_$args{_eval}_$args{frequency}"} ) {
    &uxmon::load_module( "Evaluator" );
    &uxmon::checker(
    $memory{"Evaluator_$args{alias}_$args{_eval}_$args{frequency}"} = $evaluator = Monitor::Evaluator->new( $args{"host"}
	    , $args{"_eval"}, $args{"alias"}  )
	);
    $evaluator->sched_frequency( $args{"frequency"} );
}    
$args{"_evaluator"} = $evaluator;

1;
