Hi teodor, thanks for your answer. I will try to resolve the problem with the jdt-compiler.jar in the classpath but I create my reports using: JasperReport report = JasperCompileManager.compileReport(this.getClass().getClassLoader() .getResourceAsStream(resumenCorteComite.xml)); JasperFillManager.fillReport(report, parameters, connection); How can I create my object JasperReport using just the .jasper? thanks again.