Błąd aplikacji

System.Web.HttpUnhandledException (0x80004005): Wystąpił wyjątek typu „System.Web.HttpUnhandledException”. ---> System.NullReferenceException: Odwołanie do obiektu nie jest przypisane do instancji obiektu.
   w Gloves_Specification.memphis_gloves(String str_familyref, Boolean str_MCRPart)
   w Gloves_Specification.Page_Load(Object sender, EventArgs e)
   w System.Web.UI.Control.OnLoad(EventArgs e)
   w System.Web.UI.Control.LoadRecursive()
   w System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   w System.Web.UI.Page.HandleError(Exception e)
   w System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   w System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   w System.Web.UI.Page.ProcessRequest()
   w System.Web.UI.Page.ProcessRequest(HttpContext context)
   w System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   w System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
   w System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)