Hi, I am running JRS-Pro 6.3.0 on AWS. I have created a report using Jasper Studio and added it to JSR manually by uploading the jrxml file. I need to pass 3 parameters, so I have created 3 Input Controls in the report on JSR and named them same as the parameters names. One of them is a multi-select list, so the corresponding param data type is set to java.util.List in jrxml. (I have also tried setting it to java.util.Collection.) I tested this in Studio and everything is working fine. Eventually, I am embedding this report as HTTP URL in a separate web app. So I am passing parameters on the HTTP URL. I am getting error message "HTML response error code: 500". My observation is that except multi-select param, all other params are working fine. The URL looks like below: http://<AWSIP>/jasperserver-pro/flow.html?_flowId=viewReportFlow&decorate=no&viewAsDashboardFrame=true&reportUnit=/organizations/org1/Reports/Report1&j_username=user1&j_password=user@123&USER_ID=1&USER_ID=2&USER_ID=3&START_DATE=2017-03-01&END_DATE=2017-03-05 Not sure what could be the problem. Thank you, Amit