xcode4.0 published application crash

Problem: When using the Organizer xcode4.0 published application, an error: Internal Error, specific information:
Xcode encountered an internal logic error. Choose "Continue" to continue running Xcode in an inconsistent state. Choose "Crash" to halt Xcode and file a bug with Crash Reporter. Choosing "Crash" will result in the loss of all unsaved data. < br />
Where does the problem occur?
Reply:
See tips, it should be a problem with your code. internal logic error
Reply:
Recommends upgrading to xcode4.2.1
Reply:

reference to the second floor hjue reply:

recommend upgrading to xcode4.2.1

The brother, your success with the 4.2.1 release before?
Reply:

reference to the second floor hjue reply:

recommend upgrading to xcode4.2.1

4.2.1 replaced to get, thank you very much too. Oh