Error in ASP.NET In web configuration file

Question

I am a java developer so don't know anything about ASP.NET. Please explain in a layman's terms.

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=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

Source Error:

Line 30: <add assembly="System.Web.Extensions.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
Line 31: <add assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
Line 32: <add assembly="Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
Line 33: <add assembly="Microsoft.ReportViewer.Common, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
Line 34: <add assembly="Microsoft.Build.Framework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>

What part of "The system cannot find the file specified." did you not understand? — John Saunders
– John Saunders, Commented Mar 3, 2015 at 7:57
@JohnSaunders I am not able to find that file. if you can send me the link of the file that would be great — Abhinav Pathak
– Abhinav Pathak, Commented Mar 3, 2015 at 8:00
Yeah, and neither is .NET able to find that file! It's not there! — John Saunders
– John Saunders, Commented Mar 3, 2015 at 10:20

Arun Chandran Chackachattil · Accepted Answer · 2015-03-03 08:10:24Z

3

You can install the Microsoft Report Viewer 2010 Redistributable Package and change your references so they point to the ones installed by the package.

Microsoft Report Viewer 2010 Redistributable Package

Search the missing dll in your system

Microsoft.ReportViewer.WebForms.dll

You find them in "C:\Windows\assembly\GAC_MSIL" and put them in the references of your project.

answered Mar 3, 2015 at 8:10

Arun Chandran Chackachattil

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Karan · Accepted Answer · 2015-03-03 08:01:20Z

0

You should add the missing assembly (DLL) references into your project "References" section and then perform the build again to check if is corrected.

answered Mar 3, 2015 at 8:01

Karan

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