Game Startup Error Mac OSX Leopard TGB 1.6

Hello

I created the fish level from the tutorial. Whenever I click the run button at the top of the gui I get
"Game Startup Error"

'initializeProject' function could not be found. This could indicate a bad or corrupt common directory for your game. The Game will not shutdown because it cannot properly function

and it stops. If I do a build however it works fine.

I'm sure I'm just doing something foolish, if someone could point out what I'm doing wrong I'd greatly appreciate it.

Thanks
Brian