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The following error appears when inspecting the business layer.log file (C:\ProgramData\SolarWinds\Logs\Orion\BusinessLayerHost.log):
System.IO.FileNotFoundException: Could not load file or assembly
'SolarWinds.Orion.Core.Discovery, Version=2015.1.35100.9209, Culture=neutral,
PublicKeyToken=null' or one of its dependencies.
The system cannot find the file specified.
File name: 'SolarWinds.Orion.Core.Discovery, Version=2015.1.35100.9209,
SolarWinds.Orion.DiscoveryPlugin.dll file was not moved to the correct directory during last upgrade.
This could be due to an antivirus or other scanning software interfering or permissions on the folders.
Stop all Orion services using Orion Service Manager.
Manually copy the
SolarWinds.Orion.Core.Discovery.Plugin.dll to the correct directory.
It can be found here: Volume:\program files x86\SolarWinds\Orion\Discovery
Copy it to the root directory: Volume:\program files x86\SolarWinds\Orion
Start all Orion services using Orion Service Manager.