Hi,
Not sure about your question....are you trying to save the layout???
If you ver able to execute the report, then export the output to a spreadsheet.
If you are unable to execute the report then its with the infoset. Like Jimson said, go through all the field selection steps, check basic list making sure you have selected them as per the output requred by you. Also regenerate the infoset.
Regards,
Binu