Conversion from type `DBNull` to type `Date` is not valid.
App Error Log : ControllerAppTier.Save->WORKTERRAControllerAppTier.Save->Employee.Save->Employee.UpdateEmployeeChangeStatus
Employee ID   : 8937
Action Name   : AddUpdateChangeStatus
Model         : System.Web.Mvc.HandleErrorInfo
Controller    : UserDetails
Web Error Log :    at WORKTERRA.Shared.WORKTERRAControllerWebTier.Save(ObjectType I_objectType, Object objInputObject, Object I_context, Boolean I_mode)
   at WORKTERRA.Shared.Areas.UserDetails.Models.ChangeStatusModel.AddUpdateChangeStatus(ChangeStatusModel objChangeStatusModel)
   at WORKTERRA.Shared.Areas.UserDetails.Controllers.UserDetailsController.AddUpdateChangeStatus(ChangeStatusModel objChangeStatusModel)