Error building Player: Exception: Failed building WebGL Player.

OK so here is my share of Console Build Errors after Upgrading to Unity 5.1

Looks like I'm going back to 5.0.2f1, thanks Unity for the tease of great WebGL features in Unity 5.1 that I can't use due to WebGL Build issues! Arg.... so annoying....

I have no clue what any of this stuff means or how to fix it. Any help would be appreciated.

 

Here's mine. I have the same error with 5.1f3.

 

Sure... here you go!

 

My experience (and some others) with this bug is described here:
http://forum.unity3d.com/threads/failed-building-webgl-player-ongoing.326241/

I got it working on a fairly clean build only machine but on my main machine it does not work still and even a totally new project I encounter the bug. I did another search and it looks like running as admin may be a solution. Trying this now.

edit:I ran unity3d as administrator on the machine it doesn't build on. No luck.

 

Webgl have many bugs ! and this is not one !

 

I'll give it a try as soon as i'm back at my workstation. Thanks for the reply.

 

Please help with my eror . i posted on forum

 

Jonas, I'm on Mac. See my log please.

 

Nope... It just says something about Not enough positional command line arguments (See screenshot)



Edit: I tried downloading the Visual Studio dlls from here:
https://www.microsoft.com/en-us/download/details.aspx?id=40784

But no luck... same build error.

 

I tried building with just a single cube in a scene, and still WebGL build failed but it provided a different build error:

WARNING root: emcc: link command line is very long, even with response file -- use paths with no spaces

 

I moved my Unity Project Folder to the Root of C:\ did the test build again with Cube in Scene and now it works!

I recall seeing a similar issue previously with WebGL Build providing a similar error in 5.0.2f1. My builds would not work until I moved them here "C:\Users\UserName\Unity Projects" that's where I have been building from right now since 5.0.2f1. Now I need to move my project folder to root of C:\ in order to build? Geez... Please take not of this one jonas echterhoff. It's very odd issue... builds fail because Unity does not like the path?

 

I've seen the "use paths with no spaces" message before but I still have one machine that builds my project and one that doesn't and they both have the project in the same path.

 

I tried creating a new project directly in C:. This compiled just fine.

And the best part . . . My main project in its original location now compiles (on both machines now). This is a really strange bug. Good luck tracking it down.

 

I was thinking to try now moving the project from C:\ back to it's orginal location and see if it builds now lol. Such an odd bug! I'm happy to at least be able to build and make use of the new Unity 5.1 WebGL features. Although would be nice keep my projects where I want them and not at the root of C:\.

 

Yep it did! I just Updated my game now with Unity 5.1 WebGL Features! (shaved off 13MB from the Build Size) Whoohoo!

 

Although keep in mind, I did not figure out or even think to move the project into the C:\ until I did the smaller WebGL test build with a single cube. It's odd that my game project did not display the "link command line is very long" error.

 

I'm glad for you guys. Now, I'm on Mac and can't build for WebGL...!

 

By the way, Now I just tried to Move my Project back to it's original location after a successful build from root of C:\, now the build works! What the heck... i'm happy it's working, but really such an annoying issue that slowed my progress for a bit.

 

Did you try moving your Project to root of C:\ or try building with a blank scene and a cube the way i did above? what errors do you get if you try that?

 

Well, on Mac there's no C:\.... I still have to try on Windows anyway. Here's my log:

 

Well you have a hard drive lol, so whatever the root directory of your hard drive is, place a copy of your project there and try to build from there.

 

I have the same issue, and opened a ticket (http://fogbugz.unity3d.com/default.asp?697790_1brs4i2o8oph2j8b), which still hasn't been answered by Unity.

However, I did find (today), that moving the entire project to a shorting folder name worked for me. I moved it to C:\MyProject.

I tested, and it doesn't have to be on the C drive, but the folder name needs to be short.

I'm guessing that the emscript is trying to access something in the assets folder, with a directory + filename longer than 250 characters.

Maybe Unity can use the short directory names for this process ?

 

Cool good know!

 

I've got this problem also. The only fix / that worked was running Unity 3D as Administrator.

 

I am on 5.3.2 and have the same error when building WebGL package.

 

Man thanks for your question. i fixed my problem with webgl
p.s. sorry for possible errors

 

Think I've got same error today. While building game for WebGL 3 errors have occurred.
First starts with:

After reading this topic, I tried to:
-running unity as administrator (it didn't help)
-move my project folder to C: \ (it helped, original path was probably too long)
But some people said that after moving project to C:\ they can also build at original path, that doesn't worked for me. I can only build at C:\, when moved project back to its original path the errors occured again.

So probably this error is still alive.
Unity version: Unity 2019.4.5f1 (64-bit)
I also upload my Editor.log file.

EDIT: Ok, it was my mystake. I just discovered that one of the folders had a 'ż' letter from my language (polish) in it's name. After renaming the folder, the project builds normally.

 

This error is still alive 2020.3
.

 

i am facing this issue as well

 

Same, using Unity 2021 and this occurs!

 

Exception: Failed building WebGL Player.
UnityEditor.WebGL.ProgramUtils.StartProgramChecked (System.Diagnostics.ProcessStartInfo p) (at /Users/bokken/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/ProgramUtils.cs:48)
UnityEditor.WebGL.WebGlBuildPostprocessor.EmscriptenLink (UnityEditor.Modules.BuildPostProcessArgs args, System.Boolean wasmBuild, System.String sourceFiles, System.String sourceFilesHash) (at /Users/bokken/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:445)
UnityEditor.WebGL.WebGlBuildPostprocessor.LinkBuild (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/bokken/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:495)
UnityEditor.WebGL.WebGlBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at /Users/bokken/buildslave/unity/build/PlatformDependent/WebGL/Extensions/Unity.WebGL.extensions/BuildPostprocessor.cs:933)
UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <2f1c602eae0d45c293fff3e3aef759fa>:0)
UnityEditor.PostprocessBuildPlayer.Postprocess (UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target, 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 <2f1c602eae0d45c293fff3e3aef759fa>:0)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr)


still have this problem 2019.4.17f1

 

I still got this issue , in 2020.3.25F1 I tried moving the build and root folder in C:/ but no works

 

2020.3.33f1 exists the same error .oh my god!!!

 

hello ,Have you found a solution of this problem?