Fatal error: Uncaught Error: Class 'Zend_Measure_Abstract' not found in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\Zend\Measure\Force.php:37 Stack trace: #0 {main} thrown in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\Zend\Measure\Force.php on line 37