Hello all, I have a report with 2 subreports. When i test report or subreports individually, everything is ok and 2 pages are printed. But when i want to test all of them, a blank page is printed. I think because parameters are not passed from master report to subreports. Is there anyone that can help me? This is my code : /////////////////////////\\\\\\\\\\\\ private void printCard(List lst) { Map parameters = new HashMap(); try{ InputStream frontInputStream = getClass().getResourceAsStream("Sub1.xml"); InputStream backInputStream = getClass().getResourceAsStream("Sub2.xml"); InputStream frontBackInputStream = getClass().getResourceAsStream("Master_Report.xml"); JasperDesign frontJasperDesign = JasperManager.loadXmlDesign(frontInputStream); JasperDesign backJasperDesign = JasperManager.loadXmlDesign(backInputStream); JasperDesign frontBackJasperDesign = JasperManager.loadXmlDesign(frontBackInputStream); JasperReport frontJasperReport = JasperManager.compileReport(frontJasperDesign); JasperReport backJasperReport = JasperManager.compileReport(backJasperDesign); JasperReport frontBackJasperReport = JasperManager.compileReport(frontBackJasperDesign); parameters.put("FrontCoverReport",frontJasperReport); parameters.put("BackCoverReport",backJasperReport); JRDataSource frontBackJRDataSource = new CustomDataSource(lst); JasperPrint frontBackJasperPrint = JasperManager.fillReport(frontBackJasperReport, parameters, frontBackJRDataSource); JasperPrintManager.printReport(frontBackJasperPrint, false); } catch(Exception ex) { logExceptions(ex); } } ////////////////////\\\\\\\\\\ Sincerely, Narsis.