Xcode 'CodeSign error: code signing is required'

Question

I\'ve been working on an iPhone project with iOS 4.0. I just downloaded Xcode 3.2.4 with iOS SDK 4.1 so that I can work with the updated iOS. Upon opening the project in the

Answer 1

Have you updated the firmware version of the iPhone you are testing on?

Answer 2

Summarised form an answer to Xcode fails with "Code Signing" Error

project.pbxproj files can be merged in such a way that two CODE_SIGN_IDENTITY lines can be inserted. Deleting one of these normally fixes the issue.

I have created simple script to help diagnose this issue it can be found here: https://gist.github.com/4339226

A full answer can be found here.

Answer 3

Another possibility - When you Build for Archive make sure your Archive choice in your scheme is set for Distribution, not Release.

Go to Product -> Edit Scheme This brings up a new dialog.

Select Archive on the left. Make sure the build configuration is Distribution.