Warning: Failed to load process type

[wgstarks]

I’m getting this warning for the past two backups-

• 2020-08-07 02:00:00 -04 - [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.

I have no idea what this means?

[drwtsn32]

Are you using Linux? Also what version of Duplicati?

Sounds like the issue discussed here:

Ubuntu - Failed to load process type Duplicati.Library.Common.IO.VssBackupComponents

Should be fixed in the next release, but you may not want to jump to the Canary channel for just this. A workaround someone proposed was to copy the DLLs from another system, like a Windows computer. (Make sure it’s the same version of course.) I just tested this idea and it worked for me. I copied: AlphaFS.dll AlphaVSS.Common.dll from C:\Program Files\Duplicati 2 and put them in /usr/lib/duplicati on my Linux machine. I do not know if that first one is needed or not, but it can’t hurt.

[wgstarks]

I’m running Duplicati on macOS Catalina. Version = 2.0.5.1_beta_2020-01-18

[drwtsn32]

Could be the same issue. It is benign and can be ignored. Mac and Linux don’t need to load the VSS libraries anyway (it’s a Windows-only requirement).

[harmtemolder]

I can confirm that it’s the same issue, with the same solution (adapted for macOS):

1. Download the ZIP of the latest release here
2. Extract AlphaVSS.Common.dll to /Applications/Duplicati.app/Contents/Resources/AlphaVSS.Common.dll

Now my syncs do not give me this warning anymore (on macOS Catalina 10.15.7).