Error While loading excel sheet


I am trying to load excel sheet (generated by other application) using phpexcel library, with following code

$objReader = new PHPExcel_Reader_Excel2007();
$objPHPExcel = $objReader->load('callsheet.xlsx');
$dataArray = $objPHPExcel->getActiveSheet()->toArray(null, true,true,true);


But I got this error.

Fatal error: Uncaught exception 'PHPExcel_Exception' with message 'You tried to set a sheet active by the out of bounds index: 0. The actual number of sheets is 0.' in E:\xampp\htdocs\podioexcel\Classes\PHPExcel.php:688 Stack trace: #0 E:\xampp\htdocs\podioexcel\test.php(18): PHPExcel->setActiveSheetIndex(0) #1 {main} thrown in E:\xampp\htdocs\podioexcel\Classes\PHPExcel.php on line 688

One interesting thing. when I open same excel sheet and just save file without any change. Than this code work fine , but problem is that I,m not going to open file each time before to use it. Can you please help me to fix this issue. I,ve also attached excel sheet.

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