Scatter - Disjointed vertices in Using SMS Posted August 23, 2018 · Report reply I get a message about the scatter having disjointed vertices when running model. The mesh surface looks fine and the elevations are within the expected range. However, the water surface everywhere except right at the inlet gives an elevation of -999.0. I have a constant elevation as my downstream boundary condition and two peak flow inlets. I assume it must be a problem with the downstream boundary but no success yet. Any ideas from the experts? Thanks!