11:42:03 Load Excel2007 template file<br />11:42:03 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/Excel2007.php:213
Stack trace:
#0 /home/tyesolutions/public_html/lib/excel/Tests/26utf8.php(62): PHPExcel_Writer_Excel2007-&gt;save('/home/tyesoluti...')
#1 {main}
  thrown in <b>/home/tyesolutions/public_html/lib/excel/Classes/PHPExcel/Writer/Excel2007.php</b> on line <b>213</b><br />