Warning: require(C:\Apache2\htdocs\gallery\main.php): failed to open stream: No such file or directory in E:\Apache24\htdocs\gallery\rsd\main.php on line 3

Fatal error: require(): Failed opening required 'C:\Apache2\htdocs\gallery\main.php' (include_path='.;C:\php\pear') in E:\Apache24\htdocs\gallery\rsd\main.php on line 3