New Facility for SYOS

We are having trouble with the Web API Method “GetScreens”.  We would like to create a performance that uses SYOS and the “GetScreens” call.  We have created the seat map in “Map Painter” but the column “dw_syntax” is showing up as “null” in “T_SMAP”.  How can we get this column to populate the data from the “Map Painter”?