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Building Engine - WaitMutex Exited with code 5

Hi All,

Any light on this topic would be much appreciated. I get the following error on a clean build of the engine:

C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets(41,5): error MSB3075: The command "....\Build\BatchFiles\Build.bat UE4Editor Win64 Development -waitmutex" exited with code 5. Please verify that you have sufficient rights to run this command.


Product Version: UE 4.17
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asked Oct 12 '17 at 07:41 PM in C++ Programming

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2 answers: sort voted first


If those two answers are useless,Try mine.


I spent almost half day to search for the solution to this.Finally, I found something useful.

https://answers.unrealengine.com/questions/429455/link-errors-in-ubttasknode-classes.html https://answers.unrealengine.com/questions/511544/errorlnk2001-within-ubtservice-class.html?sort=oldest


You can refer these two links above. Both the same, either one will be fine.


For your convenient, I copyed it :

This is a known issue with changing to 4.12 and using tasks. It can be resolved by simply adding “GameplayTasks” to the PublicDependencyModuleNames section inside your ‘ProjectName’.Build.cs For example: PublicDependencyModuleNames.AddRange(new string[] { “Core”, “CoreUObject”, “Engine”, “InputCore”, “AIModule”, “GameplayTasks” });


Add GameplayTasks to PublicDependencyModuleNames of the YourProjectName.Build.cs file~.

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answered May 27 '18 at 03:35 AM

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I uninstalled Incredibuild from the Visual Studio Installer and it worked for me.

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answered Oct 15 '18 at 12:31 PM

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