CUICatalog: Invalid asset identify provided: ”

Once I run my app within the iOS Simulator I can see the next error messages in Xcode Console:

It occurs after I navigate to a particular view. Trying on-line I discovered 2 the explanation why this might occur:

1. UIImage(named:) is given an empty identify, nil or ” (Error: CUICatalog: Invalid asset identify provided: (null), or invalid scale issue : 2.000000)
2. If Chosen Picture is ready in a Tab Bar within the storyboard:
   Xcode 6 Beta 6 CUICatalog: Invalid asset identify provided: (null), or invalid scale issue: 2.000000

I do not know what this error means. Does anyone know learn how to debug this?
Can I possibly use symbolic breakpoint to debug this?