http://www.wargear.net/games/view/365998
Won't let me fortify from my small plane to my capital. The fortify menu comes up, but it just has -- instead of numbers and the A button is grayed out.
There is a unit max in the capital. Is it full?
That must be it. I never noticed the unit cap before, and I don't see it in the description. I wonder how many troops I squandered without realizing it.
Sorry about that. It is on the wiki page, which is more complete:
http://www.wargear.net/wiki/doku.php?id=boards:invention:invention#other_rules
(although it is primarily for the 2nd edition which is still in beta)
I'll add it to the board description when I get a chance.