Could not load file or assembly Microsoft.ReportViewer.WebForms

Created:

2016-11-16 13:16:16 UTC

Modified:

2017-08-16 17:03:54 UTC

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Could not load file or assembly Microsoft.ReportViewer.WebForms

Applicable to:

  • Plesk 11.x for Windows
  • Plesk 12.5 for Windows

Symptoms

Site fails to open, the following error is displayed:

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.

Cause

Microsoft Report Viewer 2010 is not installed on the server.

Resolution

Download and install Microsoft Report Viewer .

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