# Missing UnrealBuildTool.exe after build

**URL:** <https://forums.unrealengine.com/t/missing-unrealbuildtool-exe-after-build/242198>\
**Category:** C++\
**Tags:** unreal-engine, Engine-Source-Code, GitHub\
**Created:** [July 23, 2021, 7:12pm UTC](https://forums.unrealengine.com/t/missing-unrealbuildtool-exe-after-build/242198 "2021-07-23T19:12:17Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![tomatorann](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@tomatorann](https://forums.unrealengine.com/u/tomatorann)\
**Post date:** [July 28, 2021, 4:20am UTC](https://forums.unrealengine.com/t/missing-unrealbuildtool-exe-after-build/242198/2 "2021-07-28T04:20:55Z")

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Do you have both UE4 and UE5, and built them from source?  
I had the same error and found a solution.

1. Copy UnrealVersionSelector.exe from “Epic Games\Launcher\Engine\Binaries\Win64” to “[UE4\_DIR]\Engine\Binaries\Win64”.
2. Run and click ‘Yes’ on prompt “Register this directory…”
3. Copy UnrealVersionSelector.exe from “Epic Games\Launcher\Engine\Binaries\Win64” to “[UE5\_DIR]\Engine\Binaries\Win64”.
4. Run and click ‘Yes’ on prompt “Register this director…”

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