Parse Issue in Xcode 4.6.3 - "Expected a type" - Can't find the error

Parse Issue in Xcode 4.6.3 - "Expected a type" - Can't find the error

I have a Problem with Xcode:
At the moment I am working on an application for iOS SDK 6.1. Somedays ago
I was implementing some methods and tried to compile the project. Then
something strange happened:
Compilation failed and I got some errors (see picture below) in two files,
which aren't related to the methods I worked on.
I searched for errors in my code but couldn't find any.
Then I closed the project and opened it again: They were still here.
Then I closed the project and Xcode and reopened both: They were still here.
Then I created a new project and copied all the code: The issue appeared
again.
Now I am stuck and have no clue what to do. Do I miss something in my code?
Please help me!