Sys Is Undefined Microsoft JScript Runtime Error Occurs
Environment
| Product | Progress® Telerik® UI for ASP.NET AJAX |
Description
When working with Telerik UI for ASP.NET AJAX, I get a Microsoft JScript runtime error that Sys is undefined.
Error Message
Microsoft JScript runtime error: 'Sys' is undefined
Cause
The possible cause for this issue is that you have added a Telerik UI for ASP.NET AJAX control but your application is not configured to use ASP.NET AJAX.
Solution
To solve this issue, follow the steps described in the Common reasons for the Sys is undefined error in ASP.NET Ajax applications blog post.
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