Wordpress - Advanced Category Excluder - Undefined Variable Error -

trying use advanced category excluder plugin , works great except on 404 page i'm getting of these "undefined variable" errors on line 446

try here: http://bolivares.com/test

line 446 reads return $filter;

in full context:

function ace_get_section() {     global $wp_query, $ace_targets;      if (is_array($ace_targets))     {         foreach ($ace_targets $key=>$val)          {           if (!empty($wp_query->$key) && $wp_query->$key == 1) $filter = $key;                       }     }     return $filter; } 

plugin page http://wordpress.org/extend/plugins/advanced-category-excluder/

anyone know how can resolved?

that $filter variable defined when conditions met when conditions not met variable undefined notice says.

so try add $filter=""; in beginning of function this:

function ace_get_section() {     global $wp_query, $ace_targets;     $filter="";      if (is_array($ace_targets))     {         foreach ($ace_targets $key=>$val)          {           if (!empty($wp_query->$key) && $wp_query->$key == 1) $filter = $key;                       }     }     return $filter; }