Rails - May 2009 - How to write data into excel files using roo

Hai,

   I am using parseexcel to export data to a excel,while exporting a
large amount of data it shows a MaxSizeError.

  Ithink that i will use roo for exporting data into excel.But i dont
know the codings to write data into excel

can anyone help me..

Thanks in Advance
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