Fatal error: Uncaught Error: Class "Sales_Controller_NumberableAbstract" not found in /home/byteshos/public_html/hrm.byteshosting.net/Sales/Controller/PurchaseInvoice.php:19 Stack trace: #0 {main} thrown in /home/byteshos/public_html/hrm.byteshosting.net/Sales/Controller/PurchaseInvoice.php on line 19