Roon Throw .Net error after MS update

Support
1

Core Machine (Operating system/System info/Roon build number)

Win10 Home 1909 Version 18363.900
Intel i7-7700 @3.6Ghz / 16GM Memory 64bit
Both server and DietPi bridge running 1.7 (571)

Network Details (Including networking gear model/manufacturer and if on WiFi/Ethernet)

Hardwired - Comcast modem -> Untangle -> Ubiquiti EdgeSwitch 24port

Audio Devices (Specify what device you’re using and its connection type - USB/HDMI/etc.)

DietPi -> usb -> Pro-Ject Pre Box S2 Digital

Description Of Issue

Roon will not start:

Log Name: Application
Source: .NET Runtime
Date: 8/26/2020 5:31:18 PM
Event ID: 1026
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: MediaServer10
Description:
Application: Roon.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
at Broo.Gdi.ChoosePixelFormat(IntPtr, PIXELFORMATDESCRIPTOR ByRef)
at Broo.Engine.WglLoaderWindow.LoadWgl(PIXELFORMATDESCRIPTOR ByRef, System.String ByRef, System.String ByRef)
at Broo.Engine.GlWindow.InitializeContexts()
at Broo.Engine.GlWindow…ctor(Broo.Engine.OpenGlWindow)
at Broo.Engine.OpenGlWindow…ctor()
at Broo.Engine.DeviceTarget…ctor(Broo.Engine.Window ByRef)
at Broo.BrooLoader.Load(Boolean, System.String, System.String, System.String, Broo.Engine.Engine ByRef, Broo.Engine.Window ByRef, Broo.Engine.LoadContext ByRef, System.String ByRef)
at Sooloos.Application.Main(System.String[])

Event Xml:



1026
2
0
0x80000000000000

28929
Application
MediaServer10



Application: Roon.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
at Broo.Gdi.ChoosePixelFormat(IntPtr, PIXELFORMATDESCRIPTOR ByRef)
at Broo.Engine.WglLoaderWindow.LoadWgl(PIXELFORMATDESCRIPTOR ByRef, System.String ByRef, System.String ByRef)
at Broo.Engine.GlWindow.InitializeContexts()
at Broo.Engine.GlWindow…ctor(Broo.Engine.OpenGlWindow)
at Broo.Engine.OpenGlWindow…ctor()
at Broo.Engine.DeviceTarget…ctor(Broo.Engine.Window ByRef)
at Broo.BrooLoader.Load(Boolean, System.String, System.String, System.String, Broo.Engine.Engine ByRef, Broo.Engine.Window ByRef, Broo.Engine.LoadContext ByRef, System.String ByRef)
at Sooloos.Application.Main(System.String[])

2

Personally, I’d tell Windows to uninstall the last .NET update it installed on the computer that is having the problem starting Roon and see if the problem goes away. If I remember correctly, MS just released a .NET update preview, which you don’t need anyway. Just wait for the next Patch Tuesday cumulative releases.

4

Hi @Beer_Good,

I would try to install the latest .NET framework available from here to see if this helps:

5

Thanks for the replies. I apologize the my late response. The latest MS updated included some changes in how it handles systems with multiple video cards. Once I set Roon to use correct card, I was back in business. image

1 Like
6

Thanks for letting us know that the issue is resolved @Beer_Good!

If you have not updated Roon yet to build 610, I would also do this, and if you run into any further issues I would also ensure you have latest GPU drivers.

7

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