Could not load file or assembly 'Microsoft.ReportViewer.WebForms, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies.

Posted on 2011-04-20
Last Modified: 2012-05-11
My website developed on Visual Studio 2008 works on the development machine but does not work on QA machine. Error: Could not load file or assembly 'Microsoft.ReportViewer.WebForms, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

<%@ Register Assembly="Microsoft.ReportViewer.WebForms, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"

I even downloaded and installed the reportViewer.exe from this following link:

I also tried changing Version= to Version= as mentioned in one of your other topics related to the same problem.

Please suggest what else I need to check.

Question by:patd1
    1 Comment
    LVL 29

    Accepted Solution

    The error is due to missing assemblies of ReportViewer.

    goto C:\Program Files\Microsoft Visual Studio 10.0\ReportViewer

    Copy following files in BIN file of your deployment


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