Hello, I am the beginner In the Jasper studio. I try to add below Property for add excel formula. <property name="net.sf.jasperreports.export.xls.formula"> <![CDATA[=($'COURSE INFO'.C7')]]> </property> this Property Gives me a runtime error. this error is below net.sf.jasperreports.engine.JRException: org.apache.poi.ss.formula.FormulaParseException: Parse error near char 1 '$' in specified formula '($'COURSE INFO'.C7')'. Expected number, string, defined name, or data table Excel Formula not work. Tell me. Please, How can I solve those error?