Hi, I have almost the same issue. I've got the same errors. It happens when Groovy come from the OSGI groovy bundle (org.codehaus.groovy 1.7.5). It works when we embed directly the jar groovy-all-1.7.5 as lib at the same level of jasperReports3.7.6 but this is not OSGI friendly andit duplicates classes in classloader. Did you find a solution? Regards, Post Edited by apupier at 12/29/2010 12:20