ErrorID     : 0
ErrorSource : ControllerAppTier.SaveAndGetData->WORKTERRAControllerAppTier.SaveAndGetData->ExecuteImportDTS.ImportData_Isolated->WTIsolatedRoutines.Main->ExecuteImportDTS.ImportData->ImportEmployeeEnrollment.ImportData->ImportEmployeeEnrollment.GenerateRatesPolicyNoHealthTierQueryStringForAll
ErrorMessage: Conversion from type 'DBNull' to type 'String' is not valid.
StackTrace:    at WORKTERRA.Shared.WORKTERRAControllerAppTier.SaveAndGetData(WORKTERRAControllerWebTierEntity objWORKTERRAControllerWebTierEntity)
   at WORKTERRA.ControllerAppTier.SaveAndGetData(Int32 intProjectsId, String strInput)
TargetSite: System.String SaveAndGetData(WORKTERRA.Shared.WORKTERRAControllerWebTierEntity)