Lightmass Swarm Agent missing since 5.6 and not present on 5.7 as well

Development Rendering
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1

Try building lights in the scene with Unreal 5.7 from the launcher and observe how it fails.

2

Steps to Reproduce
Swarm Agent started being missing in the Epic Game Launcher versions of Unreal Engine since 5.6 and seems to not still be present in 5.7.

The following error appears when trying to build lightmaps:

[Image Removed]

Which gets fixed when copying swarm agent binaries from a prior Unreal Engine Version like 5.5

3

Hi there,

Thanks for reporting this, I’ve created a bug report for this, which should become public soon. I was not able to replicate this issue on a 5.6.1 launcher version of the Engine however, only the 5.7 Preview. Link to the public bug tracker should be here once it becomes publicly available: https://issues.unrealengine.com/issue/UE-350138

Regards,

Lance Chaney

4

I confirm that 5.6 did not have it but 5.6.1 has it.

Hoping that 5.7 will have it in release instead of having to wait for a hotfix.

Thanks for looking into it!

5

Looks like the bug has been labelled fixed up-stream already, so it should be in the final release of 5.7.

6

Yup, that was fast!

Thank you.

I might be reporting a new one related to the retargeter soon, but I’m creating a repro project first.

Thanks again for such speed.