07:25:20 Create new PHPExcel object
07:25:20 Set document properties
07:25:20 Add some data
07:25:20 Define named ranges
07:25:20 Rename named ranges
07:25:20 Rename worksheet
07:25:20 Create new Worksheet object
07:25:20 Add some data
07:25:20 Resolve range
Cell B1 {=PersonFN}: Maarten
Cell B3 {=PersonFN & " " & PersonLN}: Maarten Balliauw
Cell Person!B1: 
Fatal error:  Uncaught Error: Call to a member function getCell() on null in /home/sorianoariza/appssori/proyectos-laravel/profuturo-compras-web/vendor/phpoffice/phpexcel/Classes/PHPExcel/Worksheet.php:1164
Stack trace:
#0 /home/sorianoariza/appssori/proyectos-laravel/profuturo-compras-web/vendor/phpoffice/phpexcel/Examples/19namedrange.php(99): PHPExcel_Worksheet->getCell('PERSON!B1')
#1 {main}
  thrown in /home/sorianoariza/appssori/proyectos-laravel/profuturo-compras-web/vendor/phpoffice/phpexcel/Classes/PHPExcel/Worksheet.php on line 1164