Hello,
I have an app that generates an xlsx download through the OpenXML 2.5 SDK. It opens in Excel on the desktop without issue. Validation (both in code and by using the Open XML 2.5 Productivity Tool) reports no errors.
My users have reported that iPhone and iPad fail to open it using either Excel or Google Sheets. My Android device opens it using Google Sheets or Excel without issue, but Polaris Office 6.5.2 shows only the last row of data.
If I open the file on the desktop in Excel and re-save it, my Android now can open it with Polaris Office as well. iPad is opening it properly in whatever its default app is.
Comparing the original file with the re-saved one shows that they're vastly different (different namespaces are in use, the cell contents have all been moved to the shared strings table, etc.)
It would seem that *something* is wrong with the file that isn't detected with the SDK validation. Does anyone know of a way to debug these issues? A more rigorous validator? Any insight would be most appreciated.
thanks