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Fatal error: Uncaught Error: Call to a member function query() on null in /home/envasest/public_html/a_utiles/bin/mostrar_xls_precios2 (2).php:25 Stack trace: #0 {main} thrown in /home/envasest/public_html/a_utiles/bin/mostrar_xls_precios2 (2).php on line 25