phpexcel File does not exist - symfony

Question

I am trying to read a xlsx document with PHPExcel. My document is in my local and my code shows me this error.
*
Could not open MunicipioPreinscripcion.xlsx for reading! File does not
exist.
*
This is my code (My excel document is my current directory with my controller)
#namespace Backend\AlumnosBundle\Controller
define('PHPEXCEL_ROOT', dirname(__FILE__) . '/');
$inputFileName = 'MunicipioPreinscripcion.xlsx';
$inputFileNameWithPath = PHPEXCEL_ROOT.$inputFileName;
if(file_exists($inputFileNameWithPath)) {
echo 'exist'; //Allways show exist
echo $inputFileNameWithPath."<br>";
} else {
echo 'dont exist';
}
/** Identify the type of $inputFileName **/
$inputFileType = PHPExcel_IOFactory::identify($inputFileName);
/** Create a new Reader of the type that has been identified **/
$objReader = PHPExcel_IOFactory::createReader($inputFileType);
/** Advise the Reader that we only want to load cell data **/
$objReader->setReadDataOnly(true);
/** Load $inputFileName to a PHPExcel Object **/
$objPHPExcel = $objReader->load($inputFileName); //This is where throw the error
What i am doing wrong?
How can i show the directory where load() method is looking for files? I'm lost
Thanks in advance

Answer 1

SOLVED: I think it didn´t load for permission in this directory (mybundle/controller). I have moved the xlsx file to web/upload directory and this work correctly.
$objPHPExcel = $this->get('xls.load_xls2007')->load($this->get('kernel')->getRootDir() .'/../web/upload/MunicipioPreinscripcion.xlsx');