[RESOLVIDO] Jasper: Class not found when loading object from InputStream

[ays78]

try {
    bytes = JasperRunManager.runReportToPdf(jasper, parameters, new net.sf.jasperreports.engine.JREmptyDataSource());
} catch(JRException jre) {
   throw jre;
} catch(Exception e) {
  throw e;
}

Esta me retornando erro "net.sf.jasperreports.engine.JRException: Class not found when loading object from InputStream."

Alguma dica?

[ays78]

Era a versão do Jasper. Resolvido.