For Calling a SSRS Report from x++ in Ax 2012 you can try following code hints. You can use SrsReportRunController  class to call SSRS Report.  SrsReportRunController controller;  controller = new SrsReportRunController();  controller.parmReportName(ssrsReportStr(TestReport, Detail));  controller.startOperation();  
Technical Tutorials x++,tips on issues or troubleshooting On Ax ERP ,Microsoft Dynamics 365,Ax 2012,Microsoft , U.S.,Business Software solution.