what about following 4 properties in LsttrainingattendeeHistory api?  sessionStartTimeStart ,sessionStartTimeEnd ,sessionEndTimeStart ,sessionEndTimeEnd

           "<startTimeScope>"

            "<sessionStartTimeStart>" + "01/28/2017 15:42:00" + "</sessionStartTimeStart>"

            "<sessionStartTimeEnd>" + "01/30/2017 15:42:00" + "</sessionStartTimeEnd>"

           "</startTimeScope>"

             "<endTimeScope>"

            "<sessionEndTimeStart>" + "01/28/2017 15:44:00" + "</sessionEndTimeStart>"

            "<sessionEndTimeEnd>" + "03/01/2017 15:45:00" + "</sessionEndTimeEnd>"

             "</endTimeScope>"

I always having "<serv:reason>Sorry, no record found</serv:reason>" error message.

Hello shakila.fass@gmail.com

I suspect you're getting "Sorry, no record found" due to including both startTimeScope AND endTimeScope, which will return only those sessions that both started within your startTimeScope constraints AND ended within your endTimeScope constraints. I would suggest including only startTimeScope OR endTimeScope, but not both. Let me know if you are still not getting results after that.

Kasey