CodeSign error: code signing is required for product type 'Application' in SDK 'iOS 4.2'

After update sdk4.2 , I am getting this error..

I found no way to solve.. so creating new project with existing files..

Edited: No Issues after creating new project with existing source.  :)

Edited on Feb 1, 2011

Got the same error today


This time I found the issue and fixed..

in xCode menu  Project -> Edit Active Target "App"

the profile was selected for "Code Signing Identity" instead of "Any iOS".
So deleted the value of "Code Signing Identity" and select profile for "Any iOS" . The following image is the correct one.

2013 , March 11
Got this issue again:

CodeSign error: code signing is required for product type 'Application' in SDK 'iOS 6.1'