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Home > Success Center > Network Performance Monitor (NPM) > NPM - Knowledgebase Articles > Could not load file or assembly 'SolarWinds.Batching.Contract'

Could not load file or assembly 'SolarWinds.Batching.Contract'

Updated April 20, 2017


The following exception error is displayed when adding a node or editing an existing node in Orion:

Could not load file or assembly 'SolarWinds.Batching.Contract, Version=,
Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.


  • NPM 12.0.1
  • IVIM 7.0, 7.1


The error is caused when there is a missing DLL file after the SolarWinds Recommendations Engine was not installed.


  1. Establish a remote connection to the Solarwinds server.
  2. Go to C:\ProgramData\Solarwinds\Installers and run the SolarWinds Recommendations.msi file.
  3. Run the Configuration Wizard.


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