Errore nell'applicazione

System.Web.HttpUnhandledException (0x80004005): è stata generata un'eccezione di tipo 'System.Web.HttpUnhandledException'. ---> System.NullReferenceException: Il riferimento all'oggetto non è impostato su un'istanza di un oggetto.
   in Gloves_Specification.memphis_gloves(String str_familyref, Boolean str_MCRPart)
   in Gloves_Specification.Page_Load(Object sender, EventArgs e)
   in System.Web.UI.Control.OnLoad(EventArgs e)
   in System.Web.UI.Control.LoadRecursive()
   in System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   in System.Web.UI.Page.HandleError(Exception e)
   in System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   in System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   in System.Web.UI.Page.ProcessRequest()
   in System.Web.UI.Page.ProcessRequest(HttpContext context)
   in System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   in System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
   in System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)