Fatal error: Uncaught Error: Call to a member function query() on null in /var/www/html/php/busca_ids/busca_ultimo_conv2.php:7 Stack trace: #0 /var/www/html/php/busca_ids/busca_ultimo_conv2.php(10): consulta_maximo_c2() #1 {main} thrown in /var/www/html/php/busca_ids/busca_ultimo_conv2.php on line 7