Warning: main(DB.php): failed to open stream: No such file or directory in /var/www/usage/include/pipc/pipc.php on line 15

Fatal error: main(): Failed opening required 'DB.php' (include_path='.:/usr/share/php:/var/www/usage/pear/PEAR:/var/www/usage/include') in /var/www/usage/include/pipc/pipc.php on line 15