In my case the automatic format detection is necessary. My program collects spreadsheets from different authors that can provide their data in different formats (xls, xlsx, ods, csv).
I have set "ignore this exception type" at project level.
I don't worry about this because the exception class 'EFpSpreadsheetReader' is defined in the fpspreadsheet package.
Since the author of the package says there is no problem with this, why should I doubt this?
I am happy with the temporary solution.
Many thanks.