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I am developing a classic ASP.NET Webforms App, but with an existing report and with every new one I create, I have an error on the .aspx file that goes like this Could not load file or assembly 'Microsoft.ReportViewer.Common, Version=14.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies.

I have checked references and reportviewer version on the toolbox, but everything is Version=12.0.0.0, the existing report was created using version 12, what I have to do to solve this?

elG
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1 Answers1

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Below are possible solution to your issue...

  1. Access the cssproj with notepad of the project and check whether in <assemblies> tag which ReportViewer version it is calling.
  2. Delete Your Reference & re-add the reference of reportviewer.
  3. Your system might not have ReportViewer installed. https://www.microsoft.com/en-us/download/details.aspx?id=45496
  4. You might be having multiple version of Reportviewer. please check this link for solution in this case. Microsoft ReportViewer 2012 Reference
abhijeet chimankar
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