Dear users, I am a begginer in developing reports using Jasper Report. At present, I faced with a problem that I can not solve it. As a matter of fact, I have a main report and a subreport. Furthermore, I want filling a text field in the main report using calculated value of subreport. now, I want to pass a parameter from main report to the subreport and do a query in subreport based on passed parameter. When I pass fields(not parameter) from main report to the subreport, the query of subreport is done corectly and the text field are filled with corect value. While, when I pass parameter(not field) from main report, query of subreport is not done corectly and the text field of main report remain blank. Also, I have read and tested approaches that mentioned in the Jaspersoft Community, but i can not solve it. Could you please help me to solve this problem in passing parameters from main report to the subreort? I thanks for your consideration in advance.