Dear Experts ,
i am trying to create a SO through ODATA . i created one custom FM as like as 'BAPI_SALESORDER_CREATEFROMDAT2' . and i used create , read and Query operations . (In Query Operation i used 'BAPI_SALESORDER_GETLIST' ) . First i performed GET method and through that data i am doing POST method . but here i am facing an error that it not taking values.(Attached ERROR screen shot ).

And my service is

Query mapping is

Please help me to solve this 😔
Thank you!