Application run on simulator but not on device in iphone

Question

I am using SlideView Controller and mainly when application enter through dropbox(login with dropbox) it goes to FirstViewController and in Simulator w

Answer 1

Interpreting the error message:

The error occurred in the class: Skirr method: -[SlideViewController viewDidLoad] and the error was adding a nil object.

Look at that method and find a place where something is being added to an array.