Thanks for the input. It does work when I hit populate, but it doesn't populate with the number of instances that I populated it with to begin with. When I create, say, a terraine of grass, the terraine is full when I make it but populates in a barren way when I apply it to a terraine.
Thanks Rutra. Yes, it does load with the material eco system objects showing in the general tab, but when I applied it ,it wasn't showing up. Now I guess I have to figure out how to save the eco system so that it applies without any additional adjustments to the "presences'" or number of instances?