This is a migrated thread and some comments may be shown as answers.

ASP.NET Ajax client-side framework failed to load. on RadTilelist

1 Answer 138 Views
This is a migrated thread and some comments may be shown as answers.
Top achievements
Rank 1
Chat asked on 22 Oct 2013, 09:16 AM

Hello guys

I have a problem for RadTilelist on first load.

when I run Program  it show an error like this

" Line: 48
Error: ASP.NET Ajax client-side framework failed to load."

Line: 54
Error: 'Sys' is undefined

I find some solution on other forum but it's not solution to solve my this problem.
even though :
Add this code location  into web.config

it not work for me.

anyone can help me?

I develop project on ms visual studio 2010
database oracle
my localmachine is win XP
and I use telerik controls version 2013 Q3

My example code is.

<%@ Register assembly="Telerik.Web.UI" namespace="Telerik.Web.UI" tagprefix="telerik" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

<html xmlns="">
<head runat="server">
    <link href="css/TLT.css" rel="stylesheet" type="text/css" />
    <style type="text/css">
            width: 100%;
    <form id="form1" runat="server">
    <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
            <asp:ScriptReference Assembly="Telerik.Web.UI"
            <asp:ScriptReference Assembly="Telerik.Web.UI"
            <asp:ScriptReference Assembly="Telerik.Web.UI"
        <table class="style1">
    <telerik:RadGrid ID="RadGrid1" runat="server" Skin="Web20">
                    <telerik:RadTileList ID="RadTileList1" runat="server">
                            <Title Text= "test"></Title>
                          <Title Text= "test02"></Title>

Please Help me

Best regard,

1 Answer, 1 is accepted

Sort by
Angel Petrov
Telerik team
answered on 25 Oct 2013, 06:39 AM
Hi Chat,

I am sorry to say but the information provided is insufficient for us to determine the root cause of the problem. There are a number of reasons which may cause this behavior and in order to resolve the issue I would like to ask you to provide us with a sample project which replicates it. In most of the cases the problem is caused by an unregistered handler in the web.config file. Could you ensure that this is not the case? Please give the approaches listed in this forum post a try and test whether some of them help to resolve the problem. Additionally if the issue is reproducible only in IE10 you can install the .NET fix mentioned in this sticky thread.

Angel Petrov
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed now.
Asked by
Top achievements
Rank 1
Answers by
Angel Petrov
Telerik team
Share this question