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Home > Success Center > Network Performance Monitor (NPM) > Method not found: 'System.Data.Entity.ModelConfiguration.Configuration.PrimitivePropertyConfigurationPage

Method not found: 'System.Data.Entity.ModelConfiguration.Configuration.PrimitivePropertyConfigurationPage

Created by Tiarnan Stacke, last modified by Steven Bansil_ret on Jul 22, 2016

Views: 315 Votes: 1 Revisions: 2

Updated: July 22, 2016


When attempting an upgrade of NPM, the following error appears in the Configuration Wizard:

Method not found: 'System.Data.Entity.ModelConfiguration.Configuration.PrimitivePropertyConfiguration


NPM version 12



The cause of this is a number of files in the Orion Installation Directory didn't get correctly upgraded.



  1. Open the installation directory (default C:\Program Files (x86)\Solarwinds\Orion).
  2. Remove the files EntityFramework.dll and EntityFramework.SqlServer.dll. Back them up to a location outside of Program Files.
  3. Run > appwiz.cpl.
  4. Select Solarwinds Orion Core Services 2016.1.
  5. Repair and run through the Configuration Wizard.



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