Sys.WebForms is undefined in Telerik.Web.UI.Ajax.Ajax.js

2 posts, 0 answers
  1. Shane
    Shane avatar
    17 posts
    Member since:
    Jan 2013

    Posted 18 Nov 2013 Link to this post

    Hey guys,
    I have a master page with a RadScriptManager, RadAjaxManager, and RadLoadingPanel. This morning the site was running flawlessly, then suddenly and without changing anything it started throwing a javascript runtime error every time I try to load it. The error is getting thrown in Telerik.Web.UI.Ajax.Ajax.js in set_uniqueID. The problem is that Sys.WebForms is undefined. I've tried everything I can find on the web to fix it. I've cleared the Temporary ASP.NET folder, removed the <xhtmlConformance> tag from the web.config. I've even reverted back to the baseline code from the previous build. But nothing has helped. Any idea how this can happen out of nowhere like that?
  2. Peter Filipov
    Peter Filipov avatar
    1028 posts

    Posted 20 Nov 2013 Link to this post

    Hi Shane,

    Could you provide us a live URL to test you site. Probably some resources could not be loaded and we need to inspect it with fiddler. Does the site work on a development machine?

    Peter Filipov
    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.
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