Could not insert new outlet connection

• On xcode 4.6.2 Assistant Editor does not show the corresponding .h file for a storyboard - Message is No Assistant Results
• When i manually open the ViewController.h file and try to control drag from a button to the .h (or .m) file i get the message - "Could not create new outlet connection : Cound not find any information for the class named MyViewController"

I have looked at numerous stackoverflow forum posts and tried the following

• close project & restart xcode
• Creating a new project and testing the functionality
• deleting the .m file (reference only) then adding it back in to the project
• clean project - restart xcode
• add a "Copy Headers" build phase to the target
• followed the

  Utilities

  navigation view of Xcode, in the

  Target membership

  section, uncheck & check the checkbox
• Deleting and recreating the nibs and View Controllers with the same names as before
• Deleting derived data from ~/Library/Developer/XCode/DerivedData folder and REMOVE all subfolders there referencing the project
• In the Identity Inspector for the storyboard the custom class is the name of the .h file

I am just short of reinstalling OSX as i have even tried reinstalling xcode by deleting all settings. (even tried 2 earlier versions) and i still have the same issue!

Help!!!