Warning: require_once(app/interfaces/interface.core.php) [function.require-once]: failed to open stream: No such file or directory in C:\xampp\htdocs\global.php on line 28

Fatal error: require_once() [function.require]: Failed opening required 'app/interfaces/interface.core.php' (include_path='.;C:\xampp\php\PEAR') in C:\xampp\htdocs\global.php on line 28