Hi,
i downloaded free version of XLS 8.3.0
It has the following error
No Expression foundUnexpected token type: tEqual, string value: at position 1. Formula: =100*I14/((G14-H14)+I14)
After downloading hotfix 8.8.1 the error has gone but the generated PDF has the warning:
Evaluation Warning : The document was created with Spire.XLS for .NET
To use the hotfix without the warning i have to buy a licence...
So please do not lie, free licence has also other limitations... is not bug free, it has some errors.
Below is the listing on your website and you did not mention error just number of sheets or pages.
It is totally free without any warning message for your commercial and personal use. Free version is limited to 5 sheets per workbook and 200 rows per sheet. This limitation is enforced during reading or writing XLS or PDF files. From Free Spire.XLS v7.8, there is no any limitation when loading and saving .xlsx file format. When converting Excel files to PDF files, you can only get the first 3 pages of PDF file.