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HELP, lightmass will not finish build


I have been having a hard time building my light in my persistent level. I check the forums and others have suggested to add lightmass to the exclusion list but the problem still exists. What is weird is if i load each level individually and build the light it works just fine. Now im getting the following error,

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asked Sep 21 '14 at 02:30 AM in Rendering

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Hey YrgPikk -

There are a copy of things we can try to get you back up and running.

1 - Try Deleting the Swarm Cache located at C:\Users[UserName]\AppData\Local\UnrealEngine[VersionNumber]\Saved\Swarm\SwamCache

2 - Temporarily Disable Anti-Virus / Firewall program OR add exception for SwarmAgent.exe

3 - Increase your CPU's Virtual Memory(http://windows.microsoft.com/en-us/windows/change-virtual-memory-size#1TC=windows-7)

Try these (one at a time) and let me know -

Eric Ketchum

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answered Sep 23 '14 at 05:30 PM

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Lovecraft_K ♦♦ STAFF
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avatar image YrgPikk Sep 25 '14 at 08:37 PM


these steps did not solve the problem. I did fix the issue and I am not sure which step did it. So here is what i did.

  1. recompiled the C code in visual basic.

  2. removed some lights from my map ( I had two or three directional lights in the scene) rebuilt with no errors.

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I think the problem is that everytime you create a new level, a new instance of UnreaLightMass.exe gets created which needs its own firewall rule. The only solution I can think of is to turn off firewall when working with UE4

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answered Jul 25 '17 at 06:42 PM

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