What exactly are you attempting to do? If an animation, you shouldn't be getting any kind of prompt for to screen or file; just the panel to define your codec and set the other animation parameters. If a large image to be split between multiple cows, then you have to define the areas to be rendered. I haven't done this yet, as all of my Vueing has been animation; I do know that if you haven't defined how the image is to be sectioned, then HyperVue will not activate, as there is nothing there for it to bind to.