I am trying to model a culvert with a 2D area Connection between two 2D Flow Areas. After some troubleshooting, the model is stable with no errors, but there is no flow in the downstream 2D Area. In viewing the the water surface animation in RAS Mapper, flow starts in the channel and expands into the floodplain as expected, but never makes it through the culvert to the downstream 2D area. The HW and TW 2D areas appear to be set correctly in the Connection Data Editor. The hydrograph at the upstream boundary condition peaks at 2150 cfs, and the flow at the 2D Area Connection flat lines at 0.02cfs. Any idea where the water is going?