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sitecoreweb-forms-for-marketers

Web Forms For Marketers Form Designer throws 'Handle Not Found' Error

In Sitecore 7.2, opening FormDesigner gives the following error:

Exception: System.InvalidOperationException
Message: Handle not found.
Source: Sitecore.Kernel
   at Sitecore.Web.UrlHandle.Get(UrlString urlString, String handleName, Boolean removeSessionValue)
   at Sitecore.Form.Core.Utility.Utils.GetDataSource(String url) in C:\Users\Raymond.Weng\AppData\Local\JetBrains\Shared\v01\DecompilerCache\decompiler\DA67A299-0E6A-4A9B-A8E1-031DAB1327EB\e6\7823a5d7\Utils.cs:line 219
   at Sitecore.Forms.Shell.UI.FormDesigner.GetCurrentItem() in C:\Users\Raymond.Weng\AppData\Local\JetBrains\Shared\v01\DecompilerCache\decompiler\DA67A299-0E6A-4A9B-A8E1-031DAB1327EB\a8\50ab1903\FormDesigner.cs:line 723
   at Sitecore.Forms.Shell.UI.FormDesigner.LoadControls() in C:\Users\Raymond.Weng\AppData\Local\JetBrains\Shared\v01\DecompilerCache\decompiler\DA67A299-0E6A-4A9B-A8E1-031DAB1327EB\a8\50ab1903\FormDesigner.cs:line 163
   at Sitecore.Forms.Shell.UI.FormDesigner.OnLoad(EventArgs e) in C:\Users\Raymond.Weng\AppData\Local\JetBrains\Shared\v01\DecompilerCache\decompiler\DA67A299-0E6A-4A9B-A8E1-031DAB1327EB\a8\50ab1903\FormDesigner.cs:line 128

Request information: 
Request URL: http://myurl/sitecore/shell/Applications/Modules/Web Forms for Marketers/Form Designer?xmlcontrol=Forms.FormDesigner 
Request path: /sitecore/shell/Applications/Modules/Web Forms for Marketers/Form Designer 
User host address: xxx.xxx.xxx.xxx 
User: sitecore\admin 
Is authenticated: True 
Authentication Type:  
Thread account name: NT AUTHORITY\NETWORK SERVICE

I think something is wrong with the installation, but comparing the instance with the WFFM install files, I cant see whats missing. Not even sure what Handle Not Found means?

Solution

  • This ultimately came down to the URL. Sitecore was set to inject the language into the URL automatically (This is a setting in the linkManager section of the web config). WFFM really didnt like this. When I changed that setting, everything was fine.

    UPDATE

    An example patch would be:

    <configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
<sitecore>
    <linkManager>
        <providers>
            <add name="sitecore">
                <patch:attribute name="languageEmbedding">never</patch:attribute>                   
            </add>
        </providers>
    </linkManager>
</sitecore>