Assertion failed on expression: '(srcInfo.GetChannelMask() & copyChannels) == copyChannels'

Getting a lot of these in the console on unity 2018.1, any one know why?

Assertion failed on expression: '(srcInfo.GetChannelMask() & copyChannels) == copyChannels'
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr)

 

I also get them, but only after I switched to .NET 4.x instead of the default 3.x.

I can't double click the errors to get to a script, so anyone know how to locate the issue?

 

Found several more people with the same issue, but still no solution:

https://answers.unity.com/questions/1470570/getting-some-error-always-when-i-open-unity.html

 

Here's the "full" log:

Code (CSharp):

1. Assertion failed on expression: '(srcInfo.GetChannelMask() & copyChannels) == copyChannels'
2. 0x00000001415195F8 (Unity) StackWalker::GetCurrentCallstack
3. 0x000000014151FB36 (Unity) StackWalker::ShowCallstack
4. 0x00000001413EFA1B (Unity) GetStacktrace
5. 0x00000001408A1A00 (Unity) DebugStringToFile
6. 0x000000014085F86A (Unity) VertexUtility::CopyChannels
7. 0x000000014080C6F4 (Unity) ExtractMeshComponentArray<Vector3f>
8. 0x000000014083A04C (Unity) CalculateNormalizedLightmapArea
9. 0x000000014082AB19 (Unity) MeshRenderer::GetCachedNormalizedLightmapArea
10. 0x000000014112F585 (Unity) AddInstance
11. 0x0000000141135F98 (Unity) ExtractGIInstances
12. 0x000000014114AF12 (Unity) GISceneManager::GetInstancesWithDuplicates
13. 0x000000014114A9D7 (Unity) GISceneManager::GetInstances
14. 0x000000014114FE6C (Unity) gi::UpdateMaterials
15. 0x000000014114F50E (Unity) GISceneManager::Update
16. 0x0000000141149635 (Unity) `GISceneManager::GISceneManager'::`2'::tickGIInEditorRegistrator::Forward
17. 0x000000014062AC59 (Unity) CallbackArray::Invoke
18. 0x000000014142C77E (Unity) Application::TickTimer
19. 0x00000001415CA465 (Unity) MainMessageLoop
20. 0x00000001415CC7E8 (Unity) WinMain
21. 0x00000001423F8CFA (Unity) __scrt_common_main_seh
22. 0x00007FF90C3F3034 (KERNEL32) BaseThreadInitThunk
23. 0x00007FF90DA41551 (ntdll) RtlUserThreadStart

 

Oh, workaround has been found:

http://answers.unity.com/answers/1504728/view.html

And just got notified that fix is incoming too:

https://issuetracker.unity3d.com/is...mesh-without-lightmaps-uvs-as-lightmap-static

 

I found that unchecking Lighting and Reflection Probe under static got rid of these errors.

Essentially I went through each option to see what gave me the errors

 

I get the same error:

```
Assertion failed on expression: '(srcInfo.GetChannelMask() & copyChannels) == copyChannels'
```

In 2018.2.1f1 when I manually recompute lighting.

 

My SOLUTION: Look for models in the scene that hasn't the Generate Lightmap UVs option enabled in the model Inspector.