Commented Unassigned: Problem with XLSX (XSSF) [13046]

Hi all,
I'm an Italian user of NPOI (with bad written English) ;)

I have a problem with xlsx generation. When I open the spreadsheet created with NPOI, Excel return me this message:
"Excel found an unreadable content"
but it opens correctly the file.
I have tried to download and re-compile sources from (github - https://github.com/tonyqus/npoi) with the same issue.
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I also have a problem with "AutoSizeColumn" in XSSF workbook ... this function not work properly.

Thanks,
Valerio
Comments: ** Comment from web user: tonyqus **

This may be a bug because of CultureInfo difference. Can you upload the generated Excel file?