Hello, I was using 3.6.2 version of ireport and now migrated to 3.7.6 version of ireport. I also got the same problem and resolved it. Solution: copied the below two jars in apache tomcat lib folder and it started working. 1) jasperreports-3.7.6.jar 2) groovy-all-1.7.5.jar Note - these jars can be obtained from installed folder of ireport. Path - <Program Files>/JasperSoft/iReport-3.7.6/ireport/modules/ext. Thanks, Raghav.