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Editorial Team
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Asked: 2026-05-16T03:09:38+00:00

I am trying to use YAF with Umbraco. The newest version out changed enough

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I am trying to use YAF with Umbraco. The newest version out changed enough where the old integration methods don’t seem to work. I have gotten everything fairly far on my own but I have hit a brick wall with this error:

Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
Source Error: 


Line 23:     <img src="~/yaf/images/YAFLogo.jpg" runat="server" alt="YetAnotherForum" id="imgBanner" /><br/>    
Line 24:     <form id="form1" runat="server" enctype="multipart/form-data">
Line 25:         <YAF:Forum runat="server" ID="yafForum" />
Line 26:     </form>
Line 27: </body>

I have a feeling that YAF is not starting up the database. In previous versions of YAF there was an INIT module that you loaded in your web.config file. This module is no longer there (YAF.Base.YAFInitModule).

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1 Answer

  1. Editorial Team

    I didn’t come up with this but here is the solution from http://our.umbraco.org/forum/getting-started/installing-umbraco/11233-Umbraco-and-YAF?p=0:

    Make sure your YAF installtion is really accessible. I know this sounds kind of odd, but I

    had to alter YAF.FileRoot and
    YAF.AppRoot several times until I got
    it up and running again – see
    app.config). The best way to test this
    is to overwrite your main web.config
    (the one from Umbraco with the default
    web.config from YAF.Net and see if you
    get the forum running in the subfolder
    (or folder structure) For test
    purposes you might have to temporarily
    remove Form.browser from your
    App_Browser directory as this file
    caused a lot of parsing errors when I
    only ran YAF.Net (which is pretty
    clear as we do not have the right
    references) Remove Umbraco Channels
    path=”umbraco/channels.aspx”
    path=”umbraco/channels/word.aspx” from
    the web.config as they use a different
    CookComputing.XmlRpcV2.dll than
    YAF.Net does (apparently Umbraco uses
    still a pretty old version)

    Umbraco and YAF also differ in the CookComputing.XmlRpcV2.dll file. Umbraco uses 2.2.0.4 while YAF uses 2.4.0.0. You need to deploy the 2.4.0.0 version to your server’s GAC to get this working right

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