I created a blank NavBar project and only touched a couple lines or so on one of the view controllers. I tested it fine in the 4.3 iPad and iPhone emulator but can't make it work for 4.2 at all. I get an error saying:

> 
> The selected run destination is not valid for this action.
> 
> 
> 

This is what I have on my project settings:

![Screenshot of my project settings](https://i.stack.imgur.com/VXTyD.png)

Usually in XCode 3 that was all I needed to change but I guess I'm missing some setting in XCode 4.

What could this be?