0x800a138f - JavaScript runtime error: Unable to get property '_events' of undefined or null reference for ie 10/11

2 posts, 0 answers
  1. Bill
    Bill avatar
    1 posts
    Member since:
    Jan 2014

    Posted 03 May 2016 Link to this post

    I'm working with UI for ASP.Net 2015.3 and I'm starting to get a strange error when I'm trying to do an ajax post in IE 10/11 - 


    Unhandled exception at line 563, column 32 in http://localhost:9090/WebUI/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl00_RadScriptManager1_TSM&compress=1&_TSM_CombinedScripts_=;;System.Web.Extensions,+Version=,+Culture=neutral,+PublicKeyToken=31bf3856ad364e35:en-US:f425c57c-3f06-4ae5-9b9a-1c136e57ba79:ea597d4b:b25378d2;Telerik.Web.UI,+Version=2015.3.1111.35,+Culture=neutral,+PublicKeyToken=121fae78165ba3d4:en-US:148acb90-275a-4dd3-bcec-73473d72fc70:16e4e7cd:4877f69a:86526ba7:f7645509:ed16cbdc:88144a7a:24ee1bba:c128760b:1e771326:f46195d3:2003d0b8:aa288e2d:258f1c72:a675b4ab:bfc858fd:58366029

    0x800a138f - JavaScript runtime error: Unable to get property '_events' of undefined or null reference


    I've seen other posts with errors like this one - the suggestion is usually upgrade to latest version, but 2015.3 seems pretty new.

    Trying to run this page in an ie emulation mode for an earlier version of ie does not resolve the problem.

    Any ideas why this would start happening?  

  2. Konstantin Dikov
    Konstantin Dikov avatar
    2087 posts

    Posted 06 May 2016 Link to this post

    Hi Bill,

    With the provided information only it will be difficult to pinpoint any probable cause of the error, but you If RadCompression is enabled in the web.config file, try to remove it and see if it will make any difference.

    If the issue persists, please elaborate on your exact scenario and what controls you are using on the page.

    Konstantin Dikov
    Do you need help with upgrading your ASP.NET AJAX, WPF or WinForms projects? Check the Telerik API Analyzer and share your thoughts.
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