`Could not open file .../StreamingAssets/SubScenes/*.entityheader for read` at runtime

Hello!

I have created a simple scene with few subscenes. Each subscene has a prefab with following components:

• LODGroup
• HLOD with attached appropriate LOD GameObjects
• StaticOptimizeEntity

(like in the Megacity demo)
Everything works fine in Editor ( HLOD I mean ) but when I create a build for Windows after run at runtime there are errors:

Could not open file .../StreamingAssets/SubScenes/68b0ba629adef124fa0111eeda0fdae4.entityheader for read

and the prefab is not visible.

Unity 2019.3.15f1

{
"dependencies": {
"com.unity.collab-proxy": "1.2.16",
"com.unity.entities": "0.11.1-preview.4",
"com.unity.formats.fbx": "3.2.0-preview.2",
"com.unity.ide.rider": "1.1.4",
"com.unity.ide.vscode": "1.2.0",
"com.unity.postprocessing": "2.3.0",
"com.unity.render-pipelines.high-definition": "7.3.1",
"com.unity.render-pipelines.high-definition-config": "file:../LocalPackages/com.unity.render-pipelines.high-definition-config",
"com.unity.rendering.hybrid": "0.5.2-preview.4",
"com.unity.test-framework": "1.1.14",
"com.unity.textmeshpro": "2.0.1",
"com.unity.timeline": "1.2.14",
"com.unity.ugui": "1.0.0",
"com.unity.modules.ai": "1.0.0",
"com.unity.modules.androidjni": "1.0.0",
"com.unity.modules.animation": "1.0.0",
"com.unity.modules.assetbundle": "1.0.0",
"com.unity.modules.audio": "1.0.0",
"com.unity.modules.cloth": "1.0.0",
"com.unity.modules.director": "1.0.0",
"com.unity.modules.imageconversion": "1.0.0",
"com.unity.modules.imgui": "1.0.0",
"com.unity.modules.jsonserialize": "1.0.0",
"com.unity.modules.particlesystem": "1.0.0",
"com.unity.modules.physics": "1.0.0",
"com.unity.modules.physics2d": "1.0.0",
"com.unity.modules.screencapture": "1.0.0",
"com.unity.modules.terrain": "1.0.0",
"com.unity.modules.terrainphysics": "1.0.0",
"com.unity.modules.tilemap": "1.0.0",
"com.unity.modules.ui": "1.0.0",
"com.unity.modules.uielements": "1.0.0",
"com.unity.modules.umbra": "1.0.0",
"com.unity.modules.unityanalytics": "1.0.0",
"com.unity.modules.unitywebrequest": "1.0.0",
"com.unity.modules.unitywebrequestassetbundle": "1.0.0",
"com.unity.modules.unitywebrequestaudio": "1.0.0",
"com.unity.modules.unitywebrequesttexture": "1.0.0",
"com.unity.modules.unitywebrequestwww": "1.0.0",
"com.unity.modules.vehicles": "1.0.0",
"com.unity.modules.video": "1.0.0",
"com.unity.modules.vr": "1.0.0",
"com.unity.modules.wind": "1.0.0",
"com.unity.modules.xr": "1.0.0"
}
}

 

You need to use a .buildconfiguration to build your project from the https://docs.unity3d.com/Packages/com.unity.platforms@0.5/manual/index.html . SubScene's do not get built properly using the default build system