UnityEditor.dll assembly is referenced by user code, but this is not allowed

I've run into the problem with new Unity 2021.2a14 and up: if scripting backend is set to IL2CPP and those new addressables (v1.17.17) are used to store at least one object with script (any script, even empty default one) - project won't build (at least for Windows platform x64) because of error 'UnityEditor.dll assembly is referenced by user code, but this is not allowed'. This was tested on fresh empty project without any scripts from me.

Bugreported as Case 1332720

 

any solution?

 

Fixed in Unity 2021.2.0a16 and up.

 

Still hapening in 2022.1

 

Still Happening in 2022.1.3f1

 

Still Happening in 2022.1.4f1 ! iOS build
Android is fine...

 

hello,
well the issue still exist....
OS Mac Silicon: 2022.1.5f1
but only for me on iOS

Android works fine:
Build completed with a result of 'Succeeded' in 32 seconds (31662 ms)
UnityEngine.GUIUtilityrocessEvent (int,intptr,bool&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)


iOS:
UnityEditor.dll assembly is referenced by user code, but this is not allowed.
UnityEngine.GUIUtilityrocessEvent (int,intptr,bool&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)

BuildFailedException: Incremental Player build failed!
UnityEditor.Modules.BeeBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/bokken/buildslave/unity/build/Editor/Mono/Modules/BeeBuildPostprocessor.cs:634)
UnityEditor.iOS.iOSBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/bokken/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/iOSBuildPostprocessor.cs:508)
Rethrow as BuildFailedException: Exception of type 'UnityEditor.Build.BuildFailedException' was thrown.
UnityEditor.iOS.iOSBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/bokken/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/iOSBuildPostprocessor.cs:515)
UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at /Users/bokken/buildslave/unity/build/Editor/Mono/Modules/DefaultBuildPostprocessor.cs:28)
UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.Int32 subtarget, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at /Users/bokken/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:370)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)

i'll don't believe that UnityEditor.dll assembly is referenced by user code...
if so why does the Android build not fail with same error?
M.

 

Getting the same error with WebGL build. Unity version 2022.1.5f1.

 

If you have .asmdef files, make sure to only mark the Editor field for Editor Scripts which is generally in Editor Folder.

I have this issue then I edit .asmdef files accordingly Editor sides. It worked. You should not have any Editor Scripts on Runtime.

I had these errors!


If you have DOTween package in your project. You can check the "Create ASMDEF..." to create .asmdef files properly for DOTween.

 

I tried for a while to manually edit the Asmdefs of plugins but nothing seemed to fix it. I had to give up and switch back to Unity 2021 for WebGL.

 

I believe I'm getting the same problem, but only with Android builds. Worked great in 2021.2.19f. Works great for PC builds on 2022.1.x. But for android on 2022.1.x (tested just now with 2022.1.9f)

UnityEditor.dll assembly is referenced by user code, but this is not allowed.
UnityEditor.BuildPipeline:BuildPlayer (UnityEditor.BuildPlayerOptions)
SuperUnityBuild.BuildTool.BuildProject:BuildPlayer (string,SuperUnityBuild.BuildTool.BuildReleaseType,SuperUnityBuild.BuildTool.BuildPlatform,SuperUnityBuild.BuildTool.BuildArchitecture,SuperUnityBuild.BuildTool.BuildDistribution,System.DateTime,UnityEditor.BuildOptions,string) (at Library/PackageCache/com.github.superunitybuild.buildtool@5.0.4/Editor/Build/BuildProject.cs:439)
SuperUnityBuild.BuildTool.BuildProjecterformBuild (string[],UnityEditor.BuildOptions) (at Library/PackageCache/com.github.superunitybuild.buildtool@5.0.4/Editor/Build/BuildProject.cs:347)
SuperUnityBuild.BuildTool.BuildProject:BuildAll () (at Library/PackageCache/com.github.superunitybuild.buildtool@5.0.4/Editor/Build/BuildProject.cs:30)
UnityEditor.EditorApplication:Internal_CallDelayFunctions ()

 

Seeing the same issue on 2022.1.10f, in my case only on iOS builds. Android works fine, and both platforms built fine on 2021.3.5f1. Any updates on a fix, or failing that a workaround?

UnityEditor.dll assembly is referenced by user code, but this is not allowed.
UnityEngine.GUIUtilityrocessEvent (int,intptr,bool&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)

BuildFailedException: Incremental Player build failed!
UnityEditor.Modules.BeeBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/bokken/buildslave/unity/build/Editor/Mono/Modules/BeeBuildPostprocessor.cs:634)

 

In my case, as I create a custom font asset with chinese, I only drag a font file from web into unity, and use it with TMP, then I build, the same exception just happen below.
"unityeditor.dll assembly is referenced by user code, but this is not allowed. unityengine.guiutilityrocessevent (int,intptr,bool&)"

 

Happening on 2021.3.8f1--the current LTS that unity hub prompted me to install by default. This exact error as OP when I try to build for WebGL:

UnityEditor.dll assembly is referenced by user code, but this is not allowed

 

Happening with


if i build with mono it builds and runs great but with il2cpp i get this error

 

I'm building with MONO in 2022.1.15f1 and it's still happening.

I managed to get one build out of it, I wish I recorded what I did but roughly it was. Delete all editor folders in the project, delete ScriptAssemblies, delete Library/Bee, delete Library/BuildPlayerData, reset editor.

Haven't been able to get a build work in the last 24 hours since though

 

Disabling assembly stripping got the build to work again. Will put everything back to normal and see if it still works.

 

A workaround that appears to be working for me is to switch Odin Inspector into Editor Only mode. I'm not using Odin serialization, so this is fine for me.

 

Hey. This happened to our project as well when we migrated from 2021 LTS to 2022.1.14f1 recently. We had the same error when building for Android or iOS with IL2CPP. Project is 2 years in development and we never had this error before. Downgrading back to 2021 LTS fixes the problem. Any version of Unity 2022 has this bug, including 2022.2

Nothing from suggested above worked for us.

After some research, it turned out that this error was caused by Odin Inspector plugin. I just created an empty project, added Odin Inspector from the asset store and tried to build IL2CPP and got the same error.

I reached Odin Team in hope of some clarification. They replied that it seems to be a Unity's bug. Editor ignored platform settings for libraries and tried to link plugin's editor dll instead of designed for IL2CPP. Someone in the chat also mentioned that they have similar issues with some XBox plugin as well, but I can't confirm it.

This is all I've found out. I intend to file a bug report later on. But right now we decided to downgrade to 2021 LTS because we need IL2CPP.

 

I have the same error with 2022.1.20.
When I downgrade to 2021.3.11 the error is gone.

Fun fact:
The project I tested is a small test project which is a subset of a much larger project.
The larger project does build with 2022.1.20.

 

I made exclude platform iOS from world creator .dll fileses and problem solved.

 

I am having this problem too. Everything builds fine in 2020.3.27f, but when I attempt to use 2022.1 I get the following error:

UnityEditor.dll assembly is referenced by user code, but this is not allowed.
UnityEngine.GUIUtilityrocessEvent (int,intptr,bool&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)

BuildFailedException: Incremental Player build failed!
UnityEditor.Modules.BeeBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/bokken/buildslave/unity/build/Editor/Mono/Modules/BeeBuildPostprocessor.cs:634)
UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at /Users/bokken/buildslave/unity/build/Editor/Mono/Modules/DefaultBuildPostprocessor.cs:28)
UnityEditor.Android.AndroidBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <000e80cd09d6452384f1ee06866e29a3>:0)
UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, System.Int32 subtarget, System.String installPath, System.String companyName, System.String productName, System.Int32 width, System.Int32 height, UnityEditor.BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport report) (at /Users/bokken/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:370)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)

I have spent 2 days on this, trying everything listed on the thread so far and also uninstalling Appodeal SDK and the Odin SDK, but to no avail. I also tried it in the 2022.2 beta but still no luck.

I am building for Android only. Has anybody solved this using a method not listed above?

 

Also having this issue Exact error as @Eatton but only iOS fails for me.

 

Same here, no luck by now.
Please vote: Unity Issue Tracker - IL2CPP build fails due to UnityEditor.dll usage in user code (unity3d.com)

 

the problem based on a specific dll it should be excluded from build,but unity does not say it which dll from.

 

It's happening to me on 2022.2.2f1 and it works just fine on Mono. It might be Addressables like other users said...
And downgrading to 2021 would take more effort than it should...

Voted! Fix is in review for unity 2022.

 

Happening also in 2022.2.3f1.

 

The tracker says now "Fix In Review for 2022.2.5f1" so we need to wait for 2 more versions...

 

Yeah I saw, thanks. Two more version hey, that's a long time without a build.

 

Unlike the comments in the ticket, builds work for me with 2022.2.1, with 2 and 3 I get the error.

What the hell did they do with 2022.2?
WebGL build dont work and iOS builds also break (https://forum.unity.com/threads/xco...ading-to-2022-2-0.1371966/page-2#post-8757409)

 

I love the bugs with "under consideration" for LTS and main versions but fixed in the alphas xD

I confirm 2022.2.4f1 still has the bug :')

 

Still happening in 2022.2.4.f1. Getting closer....

 

Did anyone found a workaround instead of downgrading?

 

It would be extremely nice if Unity actually gave a useful message like *where* editor is being referenced, so we could troubleshoot this.

 

It's something internal for sure. 2022.2.5f1 is up and it let me compile with IL2CPP now

 

nope... did everything... started from scratch... imported one bone to wich script or asset make the trouble...
because Unity doesn't care much... also the error message is stupid... gives no clue what is wrong...
we all gave up on this.... back to LTS version...
but that makes also trouble on Mac OS X ... Unity doesn't care much anymore.... .-(
see the Unity Hub ... bloatware

 

It's working for me on MacOS ventura (Apple Silicon M1) and 2022.2.9f1 but yeah, it sucks it is an internal bug.

 

I switched from version 2022.2.4f1 to 2022.2.12 and now it is working

 

I GOT ONE OF THE REASON WHY IT HAPPENS:
if you are using il2cpp build on Windows then just moved some external .NET dll in the Plugins folder. DON'T FORGET to drag in these dll required dependencies and references dll as well.

 

What do you mean by " DON'T FORGET to drag in these dll required dependencies and references dll as well"?
Can you explain more detail? I have some external .NET dll and having same problem.

 

Hello. I have same problem with UNITY 2023.1.9f1.
It is not possible to publish even extremely simple project to WebGL because of that error. It is desperate situation!

Can anybody help us ??

 

I have this same problem but SAME PROBLEM

System.Windows.Forms.dll assembly is referenced by user code, but is not supported on StandaloneWindows64 platform. Various failures might follow. UnityEditor.BuildPlayerWindow/DefaultBuildMethods:BuildPlayer (UnityEditor.BuildPlayerOptions)

 

Hello,
oooh that error in Unity was driving me crazy. After many days of trying every suggestion, only one suggestion works for me. Someone somewhere mentioned that sometimes might help to delete LIBRARY folder in unity project.
So I made a backup of that folder to be sure I will not loose my project and I simply deleted this folder (you need to turn off Unity first).
After that, Unity automatically downloaded whole LIBRARY folder again and that crazy error has magically dissapeared. Good luck to you all !
Maybe it will help you too.
M.

 

I got the answer but not a perfect one but can build.
In my case I'm using world creator asset for level designing but when I finalized my work it reveals can't build with weird error that you guys talking about. I tried some other ways and I got the way find dll file and check on the checkbox that named 'Editor' under 'Exclude Platforms' under Select platforms for plugin. I thinks it causes various way so it might not work for your case. Just in case~ it cause editor error but Ignore and build is work.