getting some errors while debugging this product

[lil7rocket]

Fatal error: Existing data passed is not an array
Called set_existing in /home/content/r/a/p/rapauthority/html/forums/includes/functions_databuild.php on line 164
Called build_forum_counters in /home/content/r/a/p/rapauthority/html/forums/register.php(480) : eval()'d code on line 34
Called eval in /home/content/r/a/p/rapauthority/html/forums/register.php on line 480
in /includes/class_dm.php on line 235