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Excel Reports Not Working: File format or file extension is not validAsked by markashton on April 22, 2014 at 02:05 PM
Created an excel report ... Get this ...
have you lot been frigging around with them?
Client needs this asap - please fix.
We have switched default Excel output from .xls format (Microsoft Excel 97-2003) to up to date .xlsx format (Microsoft Excel 2007 and above).
Your client should be able to open the file in Microsoft Excel 2007 and above. Alternatively, use a CSV format or convert the .xlsx file to .xls one.