I'm playing a game started in 1.7b3c and is now 1.7b4 and I can't seem to build an economic capital. My civ does not have one and I've never built one though it would have been a good idea. I have not lost any planets, and have only gained planets from one civ who still has his. I'm about to take it and I always build mine before I do that. I have looked, but it is not in any of my build tabs. I even browsed all of my planets and confirmed one has not been constructed or is under construction. Please advise.
[EDIT] I just thought to add that I have the full economic tree of research finished and built.
[EDIT] Just to clear up the confusion: This post was intended to have someone point out my stupidity due to late nights of 'just one more turn', not to point a finger at the devs or report a bug.