Hi i am importing some classes in **.pch** file it is working fine. I can build and run too but when those classes that are included in **.pch** file are accessed complier gives error but still it an build successfully and run the program too. But as soon as i again import them in some class then complier doesn't gives any error. What is the problem that is causing this?

**Edit:** I tried Cleaning Project and build folder but no effect