My file lies in /var/www/spywgc/adm/index.php folder .... and the file i want to include lies in var/www/spywgc/adm/rpt/lib_pivot.php

I want to include lib_pivot.php in index.php..... The lib_pivot.php interns include a file var/www/spywgc/lib_gen file.....

I wrote a syntax of <?php require_once('./rpt/lib_pivot.php'); ?> in index.php file... but, it keeps giving me error....

Biri bana ne yapacağımı açıklayınız.