This attribute automatically clears all target iteration graphics of the previous run - in all graphics windows - before the current run draws new calculations.
Astrogator <Satellite Object Path> SetValue ClearWindow <Boolean>
Set this attribute to true to clear the graphics windows before each run; otherwise, set it to false. If this attribute is set to true, this process will be performed whether or not there are any open graphics windows, which may result in a delay before the new run is begun that has no apparent cause.
Astrogator */Satellite/Satellite1 SetValue ClearWindow true
STK Programming Interface 11.0.1