14:50:39 Create new PHPExcel object<br />14:50:39 Set document properties<br />14:50:39 Add data<br />14:50:39 Set data validation<br />14:50:39 Write to Excel5 format<br /><br />
<b>Fatal error</b>:  Uncaught Error: Class 'PHPExcel_Calculation_Functions' not found in /home/tyesolutions/public_html/lib/excel/Classes/PHPExcel/Writer/Excel5.php:132
Stack trace:
#0 /home/tyesolutions/public_html/lib/excel/Tests/15datavalidation-xls.php(104): PHPExcel_Writer_Excel5-&gt;save('/home/tyesoluti...')
#1 {main}
  thrown in <b>/home/tyesolutions/public_html/lib/excel/Classes/PHPExcel/Writer/Excel5.php</b> on line <b>132</b><br />