I loaded up any campaign with any house and used the debug mode to take me to mission 9. As soon as the game started I upgraded my construction yard and built some concrete slabs. I then built the wind trap and you will see on the image there is no refinery for me to build! http://yfrog.com/hqdune2j This also happens on skirmish and after any campaign that I get to where you can upgrade the cons yard. If I don't upgrade my cons yard once I have built my refinery I get no new build options so can't build any tanks or quads. Let me know if you need anything else.