I'm also getting "Unrecognized token 3C in formula", I'm using phpexcel version 1.7.7, PHP 5.3.6.
The workbook is here:
Unrecognized token 3C in formula.xls
I suspect it's maybe a function from the Analysis Toolkit or a user defined function but I'm unable to locate the formula.
I've also tried reading a sheet that contains no formulae and a single text cell and limit the read to this sheet with:
$objReader = PHPExcel_IOFactory::createReaderForFile($this->file);
$sheetname = "Sheet1";
but still get the token 3C error.
Any help would be greatly appreciated...