Could not load file or assembly Microsoft.ReportViewer.WebForms, Version=8.0.0.0

We’re starting to run RSinteract against SQL Server Denali and have hit an issue with the Report Viewer control, this solution could also apply to earlier versions of SQL Server…

When running RSinteract for the first time on a SQL Server 2008, 2008 R2 or Denali machine you may come across the following error:

Configuration Error

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Could not load file or assembly ‘Microsoft.ReportViewer.WebForms, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ or one of its dependencies. The system cannot find the file specified.

Source Error:

Line 26: </buildProviders>

Line 27: <assemblies>

Line 28: <add assembly=”Microsoft.ReportViewer.WebForms, Version=8.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A” />

Line 29: <add assembly=”Microsoft.ReportViewer.Common, Version=8.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A” />

Line 30: <add assembly=”System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089″ />

Source File: C:\Program Files\ICS\RSinteract\Website\web.config Line: 28

Assembly Load Trace: The following information can be helpful to determine why the assembly ‘Microsoft.ReportViewer.WebForms, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ could not be loaded.

This is because RSinteract is trying to run the SQL 2005 Report Viewer Control. You can download it here:

http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=4016

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