Hi there, i'm having trouble finding out how to correctly pass a JavaBean DS to a subsubreport. I have the following Java code: JRDataSource javaBeansKapitelDS = new JRBeanCollectionDataSource(BeanFactory.generateKapitelCollection()); jasperReport = JasperCompileManager.compileReport("JRXML/Subreports.jrxml"); jasperUnterkapitelReport = JasperCompileManager.compileReport("JRXML/Subreports_subreport1.jrxml"); jasperEntryReport = JasperCompileManager.compileReport("JRXML/Subreports_subreport1_subreport1.jrxml"); params.put("SUB_DATASOURCE", BeanFactory.generateUnterKapitelCollection()); params.put("SUB_SUB_DATASOURCE", BeanFactory.generateEntryCollection()); jasperPrint = JasperFillManager.fillReport(jasperReport, params, javaBeansKapitelDS); JasperExportManager.exportReportToPdfFile(jasperPrint, "output/TestJAVABeansDS.pdf"); In the main report i have a report, which has a subreport, which in turn has its own subreport. In the main report i set the Datasource of the subreport as DataSource Expression "new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{SUB_DATASOURCE})" and works just fine! In the subreport i tried doing the same thing for the subsubreport (new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{SUB_SUB_DATASOURCE})) but i can't pass the SUB_SUB_DATASOURCE parameter from the main report to the subreport in order to use it there. If i define in the main report a parameter for the subreport:<subreportParameter name="SUB_SUB_DATASOURCE"> <subreportParameterExpression><![CDATA[$P{SUB_SUB_DATASOURCE}]]></subreportParameterExpression></subreportParameter>i get an exception Caused by: java.lang.NoSuchMethodException: Unknown property '' on class 'class jasperreports.datasource.Entry' ... Fill 1: exceptionnet.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Error retrieving field value from bean :... I'm using the latest jasper reports library -5.5.1 So my question is: how do i pass to the subreport the JavaBeansDS in order to use it there for the subsubreport? Thanks a lot for your time!Alex
