# Ue 5.6 Build all levels failed

**URL:** <https://forums.unrealengine.com/t/ue-5-6-build-all-levels-failed/2552526>\
**Category:** Programming & Scripting\
**Tags:** unreal-engine, question\
**Created:** [June 12, 2025, 7:27am UTC](https://forums.unrealengine.com/t/ue-5-6-build-all-levels-failed/2552526 "2025-06-12T07:27:33Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Dalaware](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Dalaware](https://forums.unrealengine.com/u/Dalaware)\
**Post date:** [June 12, 2025, 7:27am UTC](https://forums.unrealengine.com/t/ue-5-6-build-all-levels-failed/2552526/1 "2025-06-12T07:27:33Z")

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Hi is anybody else having this problem, I have updated my project from ue5.4.4 to Ue5.6 release  
all works well except build all levels fails with:

Failed to initialize Swarm. Check to make sure you have the right version of Swarm installed.

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**Author:** ![SupportiveEntity](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@SupportiveEntity](https://forums.unrealengine.com/u/SupportiveEntity)\
**Post date:** [June 12, 2025, 8:50am UTC](https://forums.unrealengine.com/t/ue-5-6-build-all-levels-failed/2552526/2 "2025-06-12T08:50:09Z")

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Hey there @Dalaware! Welcome back to the community! The swarm client was missing from the 5.6 build. The fix is already in the dev branch at the moment, but it will be introduced in hotfix one. In the meantime, you can copy the previous version’s built folders and it will work in the meantime, this thread has instructions on how to do that. Let me know if this helps!

> [@UE 5.6 has no swarm manager](https://forums.unrealengine.com/t/ue-5-6-has-no-swarm-manager/2539483/18):
>
> Looks like Epic fixed it in “Dev-5.6 branch”. So probably will be working again in 5.6.1

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**Author:** ![Pupmike1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Pupmike1](https://forums.unrealengine.com/u/Pupmike1)\
**Post date:** [June 16, 2025, 8:24pm UTC](https://forums.unrealengine.com/t/ue-5-6-build-all-levels-failed/2552526/3 "2025-06-16T20:24:01Z")

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Failed to initialize Swarm. Check to make sure you have the right version of Swarm installed. Thats the same message am getting

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**Author:** ![SupportiveEntity](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@SupportiveEntity](https://forums.unrealengine.com/u/SupportiveEntity)\
**Post date:** [June 17, 2025, 7:48am UTC](https://forums.unrealengine.com/t/ue-5-6-build-all-levels-failed/2552526/4 "2025-06-17T07:48:31Z")

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Hey there @Pupmike1! Was this after importing the old swarm build in as referenced in the other post?

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**Author:** ![TalksickVertigo](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@TalksickVertigo](https://forums.unrealengine.com/u/TalksickVertigo)\
**Post date:** [June 18, 2025, 1:45pm UTC](https://forums.unrealengine.com/t/ue-5-6-build-all-levels-failed/2552526/5 "2025-06-18T13:45:06Z")

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I had the same issue, as a temporary fix I copied the missing files from the Engine/Binaries/DotNET folder in my 5.5 install to my 5.6 install. I also had to go into the project settings and enable “Allow Static Lighting” which was unchecked for some reason.

Hope this helps!