Unity build errors

[unity_lQ4X4r7U2v_L1Q]

Hi Everyone,

I am getting the following error when trying to build for PC/Windows:

UnityEditor.BuildPlayerWindow+BuildMethodException: Error building Player because scripts have compile errors in the editor
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x00234] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:190
at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x0007f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:96
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

I have googled this issue, and the answers I found were:

1. Re-import all assets
2. Remove the .sln files (Visual Studio solution files) from your project
3. Change the build folder to outside the project
4. Remove the Plugins folder from the Assets folder

I did 1-3 and the problem remains. #4 doesn’t make since, because I have plugins which are required in that folder.
The project is compiling and running inside Unity, but it just won’t build.

My Unity version is 2018.3.4f1, if that helps…

Can you please advice? This is extremely frustrating and I am fighting this over 2 days now

Thanks!

[MSplitz-PsychoK]

Run a search through your entire codebase for “UnityEditor”. Any script that references “UnityEditor” must either be inside a folder called “Editor”, or must have all references of “UnityEditor” wrapped in pre-compile flags to exclude them from a build. By pre-compile flag, I mean something like “#if UNITY_EDITOR” / “#endif”.

@unity_lQ4X4r7U2v_L1Q

4. Remove the Plugins folder from the Assets folder

I did 1-3 and the problem remains. #4 doesn’t make since, because I have plugins which are required in that folder.

The reason this is suggested is because some plugins may have editor-only code.

[unity_lQ4X4r7U2v_L1Q]

Hi Gambit,

Thank you for your response!

I found that the SteamVR asset I am using has many references to UnityEditor, but I don’t think modifying them is a good idea.
However, I did found one reference in my code, and removed it (temporarily), and surprisingly it solved the problem. How come SteamVR can use UnityEditor in their code and it doesn’t cause build errors?

Thanks.

[MSplitz-PsychoK]

Any script inside of an “Editor” folder does not get included in a build. Any code between a “#if UNITY_EDITOR” and “#endif” also does not get included in a build. Code that is not included in a build cannot cause errors during a build or outside of the editor.

The meta files of some plugins may exclude the associated plugin from certain types of builds via platform settings.

[unity_lQ4X4r7U2v_L1Q]

Thanks for the help. It solved my problem!

[jbarraganm]

Hi to everyone.
I am just starting with unity for VR on a 3D model for the office i work for .I tried to buid up a the project and ger similar issues as the other person before. I just don really get what you meant in the comments as I dont really know much about the program and neither know how to code or similiar
The following are the errors that show up. I hope you can help me out.

Cheers

Library\PackageCache\com.unity.visualscripting@1.8.0\Runtime\VisualScripting.Core\Utilities\RuntimeVSUsageUtility.cs(18,13): error CS0103: The name ‘SavedVariables’ does not exist in the current context

Library\PackageCache\com.unity.visualscripting@1.8.0\Runtime\VisualScripting.Core\Utilities\RuntimeVSUsageUtility.cs(20,13): error CS0103: The name ‘ApplicationVariables’ does not exist in the current context

Error building Player because scripts have compile errors in the editor

Build completed with a result of ‘Failed’ in 0 seconds (473 ms)
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

UnityEditor.BuildPlayerWindow+BuildMethodException: Error building Player because scripts have compile errors in the editor at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x002da] in <42a64fd733d9417da1ea3a757ad9a96d>:0

[Kurt-Dekker]

How to troubleshoot build failures:

First, make a blank project with a single blank scene and prove that it builds successfully.

If the blank project does NOT build, go fix your Unity installation or your other tools, such as Android SDK, NDK, JDK, etc. It may even be necessary to change to a different version of Unity3D. It is generally best to stay with LTS versions of Unity3D.

Until you can build a blank project to the target platform, don’t fiddle with anything else.

Once you can build a blank project, now bisect the problem by bringing over parts of your current project and building it one subsystem at a time, perhaps stubbing things out that might trigger compiler errors.

Most often things that prevent building are third-party libraries such as Firebase.

Once you identify the subsystem, go to the documentation for it and make sure you are doing it correctly.

It may also be helpful to work through a tutorial or two for whatever subsystem is making the build fail.

Android build not building:

Recently (circa July 2022) there have been reports of Unity’s installer failing to install the Android Tools.

Can't build for Android

Latest Hub 3.2.0 in combination with Unity 2021.3.6 can't build for Android because there is a missing Tools folder inside *Editor\Data\PlaybackEngines\AndroidPlayer* so Unity can't find gradle. That folder is simply not created during the installation. The workaround is to copy the whole Tools folder from the previous Unity version or if you don't have the previous version then do what [mention|1j+oWeNEPCI6ejbN15sncw==] says in the post below .

Here was how I brought up Unity2020.3.41 and the Android SDK 31 on October 30, 2022:

.AAB Build Targeting API Level 33 on Unity 2021.3.8 with JDK 1.8.

Android Gradle errors and other related stuff:

Unity Gradle bug... please help