The type 'Microsoft.SharePoint.Portal.Analytics.UI.ReportViewerMessages, Microsoft.SharePoint.Portal, Version=, Culture=neutral, PublicKeyToken=71e9bce111e9429c' does not implement IReportViewerMessages

You get this error when you have a custom ASPX page having a ReportViewer WebPart.

I initially had my SSRS 2008 running in SharePoint Integrated Mode, later I changed the mode to Native and also uninstalled the SharePoint Reporting Services Add-in.

Even after this, I still had this error coming up.

This is what I did to fix it :

added inside the tag of my SharePoint application as well as the virtual directories of ReportServer and ReportManager (these are inside C:\Program Files\Microsoft SQL Server\MSRS10.MSSQLSERVER\Reporting Services)

Last but not the least, I also restarted the server for this to start working! :)


  1. Hi,

    i did not understand the fix, please explain.

  2. Hi can you explain this fix please.


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