Roon Server/Roon failing to start after updating to build 1167

Roon Server/Roon failing to start after updating to build 1167

There have been a few reports that after updating to Roon and/or RoonServer to build 1167, the Roon Core fails to start with the following error contained in logs:

Application Domain:    RoonAppliance
Assembly Codebase:     file:///opt/RoonServer/Appliance/RoonAppliance.dll
Assembly Full Name:    RoonAppliance, Version=, Culture=neutral, PublicKeyToken=null

   Exception Source:      RoonBase
   Exception Type:        System.Exception
   Exception Target Site: Bit.GetString
   Exception Message:     bit is not a string
   Exception Data:        none

A hotfix to address this issue has been released with Roon build 1169, but if you were impacted by this issue and your Roon/RoonServer Core is not starting properly, please follow the below instructions to correct this issue:

Roon Core running on Nucleus/ROCK

  1. Stop RoonServer process on the RoonOS Web Interface


  1. Go to your Nucleus or ROCK Database Location via another PC on the network – instructions

  2. Go to Database/Registry/Core

  3. Delete the file called bits


  1. Start RoonServer again from the Web Interface again


Roon Core running on Windows

  1. Close out of the Roon app and RoonServer app (if in use) in the system tray 
  2. Locate your Roon or RoonServer Database.
  • Open Windows File Explorer and click on the header (address bar)
  • Type or paste the following into the header/address bar (depending on your install type):
  • This will take you to your RoonServer or Roon folder, this is your Roon Database:

  1. In your Database folder, locate the following folder: /Registry/Core
  2. Remove the file called bits:

  1. Start Roon or RoonServer again

Roon Core running on macOS

  1. Close out of the Roon app and RoonServer app (if in use) in the system tray 

  2. Locate your Roon or RoonServer Database

    • Open Finder and click Go in the top bar

    • Hold down the Option key (or Alt)(⌥) to unhide the Library folder

    • Click the Library folder

    • Find and open the RoonServer or Roon folder, depending on which you are using on your Mac. This is your Roon Database.

      Screenshot 2022-11-30 at 11.53.22 AMScreenshot 2022-11-30 at 11.53.22 AM100%75%50%

  3. In the Database folder, locate the following folder: Registry/Core

  4. Delete the file called bits

    Screenshot 2022-11-30 at 11.55.31 AMScreenshot 2022-11-30 at 11.55.31 AM100%75%


  5. Start Roon or RoonServer again

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