diff --git a/application/models/quality_model.php b/application/models/quality_model.php
index b04126da..df507c19 100755
--- a/application/models/quality_model.php
+++ b/application/models/quality_model.php
@@ -145,7 +145,7 @@ class Quality_model extends CI_Model
 		$this->db->join('ip_invoice_items','ip_invoices.invoice_id=ip_invoice_items.invoice_id');
 		$this->db->join('ip_products','ip_invoice_items.item_product_id=ip_products.product_id');
 		$this->db->join('ip_invoice_custom','ip_invoices.invoice_id=ip_invoice_custom.invoice_id and invoice_custom_fieldid=62');
-		$this->db->where('ip_invoices.invoice_number NOT IN (SELECT invoiceid from T_Test_Report_Master)',NULL,false);
+		$this->db->where('ip_invoices.invoice_number NOT IN (SELECT invoiceid from T_Test_Report_Master where invoiceid is not null)',NULL,false);
 		$this->db->order_by('ip_invoices.invoice_number','desc');
 		$res = $this->db->get();
 		//print_r($res->result());die();