Hi Everyone, I am using the JasperReport 3.0.0 and iReport 3.0.0, i am exporting the report in Excel format in that i want to add the dynamic formula, i saw some forum discussion that we can use the propertyExperssion tag but i didn't find any detailed explaination about that tag. <propertyExpression name="net.sf.jasperreports.export.xls.formula"> </propertyExpression> Can anyone give me the detailed explaination abt this tag. that will be greatful. Thanks Satish