Vray+GH delay?

Hi all,

I´ve being using the Giulio Piacentino script to save a rendered image from vray (only one frame):

At the ends says:

    Rhino.RhinoApp.RunScript("_-Render", false);
    Rhino.RhinoApp.RunScript("_-SaveRenderWindowAs \n\"" + savedLocation + "\"\n", false);
    Rhino.RhinoApp.RunScript("_-CloseRenderWindow", false);

My problem is that vray takes a wile to finish the render, but the png file is saved before it ends. So the results its an uncompleted redered image. I tried to add a delay with no luck...

How could I tell the component to wait until the rendering process ends?

Any ideas?

thankss!