ASP.NET

"Value does not fall within the expected range".

[NullReferenceException: Object reference not set to an instance of an object.]
   System.Web.Mvc.Controller.PossiblyLoadTempData() +52
   System.Web.Mvc.Controller.BeginExecuteCore(AsyncCallback callback, Object state) +92
   System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +161
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +92
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag, Int32 timeout) +97
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag) +53
   System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +417
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +49
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__2(AsyncCallback asyncCallback, Object asyncState) +127
   System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +161
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +92
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag, Int32 timeout) +97
   System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate endDelegate, Object tag) +53
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +373
   System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +88
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +50
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +301
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            try
            {
                if (e.CommandName == "Application_verify")
                {
                    int RequestId = Convert.ToInt32(e.CommandArgument);
                    Response.Redirect("~/ApplicationDetails.aspx?RequestId=" + RequestId);
                }
                if (e.CommandName == "Appication_reject")
                {
                    int RequestId = Convert.ToInt32(e.CommandArgument);
                    //Response.Redirect("?projectid=" + projectid);
                }
                
            }
            catch (ApplicationException ex)
            {
                lblsuccess.Visible = true;
                lblsuccess.Text = ex.Message;
            }
            catch (Exception ex)
            {
                StackTrace st = new StackTrace(new StackFrame(true));
                StackFrame sf = st.GetFrame(0);

                int line = sf.GetFileLineNumber() - 1;
                if (ex.Message.StartsWith("Thread") == false) { Response.Redirect("~/HandleError.aspx?ID=" + ex.Message, false); }
            }
        }