Error loading navigation: The Managed Navigation term set is improperly attached to the site.

Hi all,

I'm experiencing this problem with creating Managed Navigation Term Set programatically.

Problem is, sometimes it works, most of the time it doesn't. It gives me the error in the above title. I am following these instructions: http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.publishing.navigation.navigationterm.aspx

I took a look at the ULS logs but they just repeated the error mentioned above. And something like TermSet is not attached to SPWeb.

I am using SharePoint 2013 / Visual Studio 2012. I deploy the above code using FeatureReceiver with Site scope. Something like:

FeatureActivated(Properties)

{
 SPSite site = properties.Feature.Parent as SPSite;
 
 CreateSampleNavTermSet(new TaxonomySession(site), site.OpenWeb());

}

Does anyone else experienced this problem before?

Thanks!