does this exist in loadrunner 8.1 fp4? thats the version I have, I don't have support via hp anymore and cannot really get help from anyone in the company on it, running vugen constantly causes drive to fill up with logfiles so I do need to kill the process but only after I have run through a certain amount of iterations. I did a google for lrengine but didn't find anything of use, I will check the 1200 page manual I have at work tomorrow morning though thanks for the tip.