I run a simulation, but when I go to the Map Display I get the error:

Read Data:System.NullReferenceException: Object reference not set to an instance of an object. at.Hnet.Common.Core.CHaSR\rvRendererBase.GetLayerT extSymbolEx(IGeoFeatureLayer pGeoLayer) at.InfoSuite.HaMapSrv.frmMapDisplay.ReadData()