Fatal error: Uncaught Error: Class 'Zend_Validate_Barcode_AdapterAbstract' not found in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\Zend\Validate\Barcode\Ean2.php:33 Stack trace: #0 {main} thrown in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\Zend\Validate\Barcode\Ean2.php on line 33