visual studio - C++ VS 2013 Error "Unable to start program" -

i getting error when debugging code on vse 2013 "unable start program 'c:.....\filename.exe" "the system cannot find file specified"

this ever happens when create new header , include in main.cpp. tried navigating directory of solution , located .exe of it. when making simple code prints .exe remains in folder though when including header .exe disappears...