Hi, I'd like to include a subreport using JRCsvDataSource in a master report's summary band. I compile both the reports and then fill the master one using JasperFillManager.fillReportToStream(in, out, params, dataSource); but the subreport doesn't show. ?? Any idea why that could be ?? I have already set the datasource expression of the subreport to $P{REPORT_DATA_SOURCE} so that it has it, but still... Thanks, miro