Hey spassbas-
Since the error seems to be an access violation in the SetCamera1P() function, I think the issue may be the GetMesh() inside the function. Can you comment out the GetMesh()->SetOwnerNoSee(true); line above and see if the project will open after compiling? If you are still unable to open the project, could you post the full AThirdPersonTestCharacter class (.h and .cpp) as a zip file?
Cheers