Thanks for your reply.
Yes, I eventually came to the same conclusion. As I wrote, I’m a newbie here. It wasn’t clear to me that you had to fill out fields on the 2nd tab (but not on the 3rd tab) in order for the button to work. And the error message didn’t help much either.
I suggest you either move all mandatory fields to the first tab, or at least clearly point out where the fields are that aren’t validating, and if possible why. I assume all this is really obvious to anyone used to DreamFactory, but not to a newbie.
-JM