tARGETS FOR PICK

I am running ecobra with Ace 3.5 with a smartvision. It has a camera over a back lit conveyor. then Downstream it picks. I would like to find the variable that tells me the pick up area has good targets that the robot can pick. So i can stop the conveyor and allow the robot to pick all good targets. I tried the instance count from inst.count = VRESULTS($sv.client_ip,2, 3, 1, 1310,1,1)