Question [SOLVED] Loading Entity Scene failed because the entity header file couldn't be resolved.

I'm getting this when trying to run in the editor. Does anyone know how to resolve?

Is there some cache to clear?

 

Typically I've fixed it just after posting...

I downgraded back to 2020.2 beta13 (from 14)
And then DOTS->Clear entities caches and it's fixed

 

Thanks! Had the same issue.

 

still here, after two months..
a bug that completely breaks the project
REEEEE

 

I'm also getting this error

 

don't use outdated uitoolkit package, its inbuilt in unity now in latest alpha build

 

I had a similar issue, I posted a possible fix for certain cases when there's another compilation error (inside the subscene) blocking the entity scene import process:
https://forum.unity.com/threads/sub...be-resolved-burst-error.1018135/#post-7515083

 

In 1.0 (latest) also this bug happens from time to time - sometimes helps just to clear entity cash and sometimes you need even to exit Unity Editor and then start it again to disappear - also sometimes if i open subscene error is gone and when i close it error come back. Hopefully this will be fixed in next Unity dots versions

 

Same here. Unity 2022.2.0b13 when building basic ECS system and hit build and run, you get empty screen, with

-logFile log.txt

I see the message
Loading Entity Scene failed because the entity header file couldn't be resolved

 

The clear entity cache might help in these situations :

 

It's been move to preferences > entities now. See post above.

 

Thanks for the cache trick! Seems to help as a band-aid while things are still unstable and inconsistent!

 

@jdtec It is not the bug of Unity, it is a bug of Entities package. And no matter you clear cache or not, the `sceneLoadDir` are always `StreamingAssets`. So the loadding process always fail if your subscene is not in that folder.



The full code is

Code (CSharp):

1.  
2. //SceneHeaderUtility.cs: line 357
3. public static void ScheduleHeaderLoadOnEntity(EntityManager EntityManager, Entity sceneEntity, Hash128 sceneGUID, RequestSceneLoaded requestSceneLoaded, Hash128 artifactHash, string sceneLoadDir)
4. {
5.     EntityManager.AddComponentData(sceneEntity, new ResolvedSceneHash { ArtifactHash = artifactHash });
6.     EntityManager.AddComponentData(sceneEntity, CreateRequestSceneHeader(sceneGUID, requestSceneLoaded, artifactHash, sceneLoadDir));
7. }
8.  

 

Sorry, I am wrong on this issue. It is cause by my own runtime error in BakeSystem which is not shown in console window. You can find it in

Project/Logs

folder.

 

Looks like I got this issue by having a folder start with a numeral instead of a letter.

Edit: Nope, that didn't work, still having this issue.

 

I don't know how to fix, but I've noticed that when there isn't a folder called "GlobalEntitiesDependencies" with a ScriptableObject inside. It's likely that the Player (not editor) will fail to run. I cleared the cache and then the folder appeared. I'll test a build now to confirm my thoughts.

 

So I updated to 1.0.0-Pre.15 (which I had to do manually) and all my issues are gone. Must have been a bug that needed to be fixed. Thanks Unity DOTS team!

 

Okay, so it came back. Turns out I was opening stuff in Visual Studio 2019. Make sure it is 2022 or you are gonna have a bad time.

 

Anyone facing the Loading Entity Scene failed because the entity header file couldn't be resolved issue:

I've figured out that this issue is rarely related to the problem with the SubScene itself, but instead is cause by the Exception thrown by Burst compilation during the SubScene import. To try and identify the source of the real problem you can:
1. Disable the SubScene in the Hierarchy and run the PlayMode - sometimes it shows the bugs and exceptions that are not show with the SubScene being turned on (such as

GetSingleton() requires that exactly one entity exists that matches this query, but there are {0}

)


2. After getting the Loading Entity Scene failed because the entity header file couldn't be resolved error, go to /Logs folder of your project and open the "AssetImportWorker[0-N].log file.


Type in the "Exception" in the search - you will probably be able to find something like this:



In my case, the compilation exception was caused by incorrectly managing native collections. In yours - it might be smth else. Anyway, you can comment out the problematic code and try building again to check if it indeed is the source of the problem. Hope it helps!

 

Same here. Thanks for the heads up, I would have never figured that out

 

@tjumma would you mind detailing exactly how the native collection was incorrectly managed? In my case I'm getting this error in builds when including the following field in my `IComponentData`, using Unity DOTS 1.0:

Code (CSharp):

1.     public struct MyLookup : IComponentData
2.     {
3.         public NativeHashMap<int, MyStruct> Value;
4.     }
5.  

EDIT:
I think my issue is that i was trying to add the component in the baker, which looks like it isnt supported

 

Really helpful. Thanks!

 

Oh thank you so much for this, it was the actual issue

 

Same issue, but I have no exceptions ;-/

 

This does seem to pop up when your SubScene throws errors during import. However, the error it's throwing seems to be within Entities and ECB playback. Not fixed by any above solution. Clearing the cache does nothing.

This is a fairly simple project, and pretty annoying:

Code (CSharp):

1. 1.0.16/Unity.Entities/EntityCommandBuffer.cs:3645
2.   at Unity.Entities.BakedEntityData.ApplyBakeInstructions (Unity.Entities.Baking.BakeDependencies& dependencies, Unity.Entities.Baking.IncrementalBakingContext+IncrementalBakeInstructions instructions, Unity.Entities.BlobAssetStore blobAssetStore, Unity.Entities.BakingSettings bakingSettings, Unity.Entities.Conversion.IncrementalHierarchy& hierarchy, Unity.Entities.Baking.GameObjectComponents& components) [0x01144] in ./Library/PackageCache/com.unity.entities@1.0.16/Unity.Entities.Hybrid/Baking/BakedEntityData.cs:872
3.   at Unity.Entities.BakingSystem.Bake (Unity.Entities.IncrementalBakingChangeTracker changeTracker, UnityEngine.GameObject[] cleanRootGameObjects) [0x00103] in ./Library/PackageCache/com.unity.entities@1.0.16/Unity.Entities.Hybrid/Baking/BakingSystem.cs:155
4.   at Unity.Entities.BakingUtility.BakeScene (Unity.Entities.World conversionWorld, UnityEngine.SceneManagement.Scene scene, Unity.Entities.BakingSettings settings, System.Boolean incremental, Unity.Entities.IncrementalBakingChangeTracker changeTracker) [0x0004e] in ./Library/PackageCache/com.unity.entities@1.0.16/Unity.Entities.Hybrid/Baking/BakingUtility.cs:83
5.   at Unity.Scenes.Editor.EditorEntityScenes.BakeAndWriteEntityScene (UnityEngine.SceneManagement.Scene scene, Unity.Entities.BakingSettings settings, System.Collections.Generic.List`1[T] sectionRefObjs, Unity.Scenes.Editor.WriteEntitySceneSettings writeEntitySettings) [0x0003d] in ./Library/PackageCache/com.unity.entities@1.0.16/Unity.Scenes.Editor/EditorEntityScenes.cs:77
6.   at Unity.Scenes.Editor.SubSceneImporter.ImportBaking (UnityEditor.AssetImporters.AssetImportContext ctx, UnityEngine.SceneManagement.Scene scene, Unity.Scenes.SceneWithBuildConfigurationGUIDs sceneWithBuildConfiguration, Unity.Entities.Build.IEntitiesPlayerSettings settingsAsset, UnityEngine.GameObject prefab) [0x0007d] in ./Library/PackageCache/com.unity.entities@1.0.16/Unity.Scenes.Editor/SubSceneImporter.cs:157
7.   at Unity.Scenes.Editor.SubSceneImporter.OnImportAsset (UnityEditor.AssetImporters.AssetImportContext ctx) [0x000d8] in ./Library/PackageCache/com.unity.entities@1.0.16/Unity.Scenes.Editor/SubSceneImporter.cs:253
8. UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:206)