I am sending TradeCaptureReportRequest (35=AD) and getting TradeCaptureReportRequestAck message in Message Crack (API method). Also I am getting error message as “ <event> Message 3 Rejected: Tag appears more than once (Field=524)”. I am using latest QuickFix FIX44.xml. I am using is QuickFIXn library v 1.5 (https://github.com/connamara/quickfixn). I hope this the latest code. Your help is highly appreciated.