Build error: source path cannot be empty

Hey guys,

I've put together just a little GUI based game, just one scene, barely any functionality even at this point. I wanted to build and put it on my phone to test how some of the movements felt, but I'm hitting a wall on this build error I can't figure out.

I've built other projects before on this machine, no problem. I had thought it might be related to RenderPipeline related, as I had not installed or setup URP yet, and I was seeing "BuildPostProcessor" a lot in the errors. (I don't know enough about this area, yet, sadly). I have since installed URP, set it up in Player options, but am getting the same errors.

• Unity 2019.3.9f1
• OS: Windows 10
• Build Platform: iOS

Thanks for any help!

Michael



-----------------------------------------------------------------------------------------------------------
Error #1:
ArgumentException: source
Parameter name: The source path cannot be empty.

Code (CSharp):

1. ArgumentException: source
2. Parameter name: The source path cannot be empty.
3. UnityEditor.FileUtil.CheckForValidSourceAndDestinationArgumentsAndRaiseAnExceptionWhenNullOrEmpty (System.String source, System.String dest) (at <bf679006b1b84db2a5a44842ef13dc36>:0)
4. UnityEditor.FileUtil.CopyFileOrDirectory (System.String source, System.String dest) (at <bf679006b1b84db2a5a44842ef13dc36>:0)
5. UnityEditor.FileUtil.ReplaceFile (System.String src, System.String dst) (at <bf679006b1b84db2a5a44842ef13dc36>:0)
6. UnityEditor.iOS.PostProcessiPhonePlayer.AddLaunchScreenFilesCustomStoryboard (UnityEditor.iOS.PostProcessiPhonePlayer+ProjectPaths paths, UnityEditor.iOS.PostProcessiPhonePlayer+IncludedFileList includedFiles) (at C:/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/BuildPostProcessor.cs:1894)
7. UnityEditor.iOS.PostProcessiPhonePlayer.PostProcess (UnityEditor.iOS.PostProcessiPhonePlayer+BuildSettings bs, UnityEditor.iOS.PostProcessiPhonePlayer+ProjectPaths paths, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.Build.Reporting.BuildReport buildReport) (at C:/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/BuildPostProcessor.cs:775)
8. UnityEditor.iOS.PostProcessiPhonePlayer.PostProcess (UnityEditor.iOS.PostProcessorSettings postProcessorSettings, UnityEditor.Modules.BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/BuildPostProcessor.cs:660)
9. UnityEditor.iOS.iOSBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/ExtensionModule.cs:45)
10. Rethrow as BuildFailedException: Exception of type 'UnityEditor.Build.BuildFailedException' was thrown.
11. UnityEditor.iOS.iOSBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/iPhonePlayer/Extensions/Common/ExtensionModule.cs:49)
12. UnityEditor.Modules.DefaultBuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args, UnityEditor.BuildProperties& outProperties) (at <bf679006b1b84db2a5a44842ef13dc36>:0)
13. 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 <bf679006b1b84db2a5a44842ef13dc36>:0)
14. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Error #2

Code (CSharp):

1. Build completed with a result of 'Failed' in 116 seconds (115623 ms)
2. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
3.  

Error #3: UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors

Code (CSharp):

1. UnityEditor.BuildPlayerWindow+BuildMethodException: 2 errors
2.   at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x002bb] in <bf679006b1b84db2a5a44842ef13dc36>:0
3.   at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x00080] in <bf679006b1b84db2a5a44842ef13dc36>:0
4. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
5.  

 

Oops! Of course, as soon as you get frustrated enough to reach out and ask for help, you find the problem yourself!

In the rare instance that someone in the future makes the same mistake I did, I suppose I'll leave this up here to explain what happened.

Project Settings>Player>iOS>Splash Image>Use Storyboards for Launch Screen
Turn that off, unless you have the custom Storyboards ready to choose!

In my other projects, Xcode always gave me warnings about wanting these storyboards. This time I'd thought I would check that box in Unity, and assumed (hoped?) that it would just convert whatever it does to storyboards. I guess that's not the case. No big deal, just turned it off, and viola! Built!

Good luck, future fellow idiots!

 

Hi @

I also fell into this trap)))
Michael, Thank you for describing the solution to the problem and leaving it here!

 

Same here and your post saved me a lot of time.....

 

Thank you!
I really didn't know where to start with that one.
Seems like it snuck in during the jump from 2019.2 -> 2019.4.

 

Thanks

 

THANKS! I fell into this very same trap. Dude, that error feedback is BAD.

 

Thanks a lot!

 

Thanks!

 

Thanks!
I meet this problem when upgrade Unity from 2019.2 to 2019.4.