error free_result();

[eluser]Unknown[/eluser]
hi everyone!
iam a beginner of codeigniter member, i have a little problem with this code "free_result();"

the code like this :

Code:

function getMember($id){
        $data = array();
        $this->db->where('id',$id);
        $this->db->limit(1);
        $Query = $this->db->get('Member');
        if($Query->num_rows() > 0){
            $data = $Query->row_array();
        }        
        $Query->free_result();
        return $data;
    }

help me please ^_^, thanks for help