What does warning "Failed to load process type" signify?

  • 2021-01-07 11:00:00 +01 - [Warning-Duplicati.Library.DynamicLoader.DynamicLoader`1-SoftError]: Failed to load process type Duplicati.Library.Common.IO.VssBackupComponents assembly /Applications/Duplicati.app/Contents/Resources/Duplicati.Library.IO.dll, error message: Could not load type of field ‘Duplicati.Library.Common.IO.VssBackupComponents:_vssBackupComponents’ (1) due to: Could not load file or assembly ‘AlphaVSS.Common, Version=1.4.0.0, Culture=neutral, PublicKeyToken=959d3993561034e3’ or one of its dependencies.

The warning shows intermittently and leads to duplicati-monitoring showing the backup as having trouble.

Version 2.0.5.1_beta_2020-01-18 running on macOS Catalina

Harmless bug that appears on non-Windows platforms and can be ignored. A fix is in newer canary versions and will make it into the next beta. There is a way to manually fix this on 2.0.5.1 if it really bothers you:

  1. Download the ZIP of 2.0.5.1 here: https://github.com/duplicati/duplicati/releases/download/v2.0.5.1-2.0.5.1_beta_2020-01-18/duplicati-2.0.5.1_beta_2020-01-18.zip
  2. Extract AlphaVSS.Common.dll to /Applications/Duplicati.app/Contents/Resources/AlphaVSS.Common.dll