# How to enable it Swarm **URL:** \ **Category:** Getting Started & Setup\ **Tags:** unreal-engine, crash, question\ **Created:** [February 16, 2025, 4:29pm UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756 "2025-02-16T16:29:10Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![NailV123](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NailV123](https://forums.unrealengine.com/u/NailV123)\ **Post date:** [February 16, 2025, 4:29pm UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/1 "2025-02-16T16:29:10Z")
I tried to build a light but constantly gives an error that there is no connection to Swarm: ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/c/d/e/cde840d46bfbb7b6d818d7f19c61ea2b5b30303b.png) Sorry for my English ---
**Author:** ![FrostyJas](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/frostyjas/32/1194640_2.png) [@FrostyJas](https://forums.unrealengine.com/u/FrostyJas)\ **Post date:** [February 17, 2025, 6:16am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/2 "2025-02-17T06:16:57Z")
Hi there @NailV123 I’d recommend this thread here [How to update SwarmAgent.exe.config?](https://forums.unrealengine.com/t/how-to-update-swarmagent-exe-config/354671) I hope that helps! ---
**Author:** ![NailV123](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NailV123](https://forums.unrealengine.com/u/NailV123)\ **Post date:** [February 17, 2025, 6:46am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/3 "2025-02-17T06:46:09Z")
Okay I’ll try ---
**Author:** ![NailV123](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NailV123](https://forums.unrealengine.com/u/NailV123)\ **Post date:** [February 17, 2025, 8:02am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/4 "2025-02-17T08:02:12Z")
I created a cache folder and selected it by default in Swarm and everything worked 🙂 ---
**Author:** ![NailV123](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NailV123](https://forums.unrealengine.com/u/NailV123)\ **Post date:** [February 17, 2025, 8:56am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/5 "2025-02-17T08:56:17Z")
Hi @FrostyJas! help please === Lightmass crashed: ===Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION writing address 0x00000135db470000 Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION writing address 0x00000135db470000 0x00007ffcba5a6cbc embree.dll!UnknownFunction 0x00007ffcba9afdc0 embree.dll!UnknownFunction 0x00007ffcba9adbc1 embree.dll!UnknownFunction 0x00007ffcba9ad87b embree.dll!UnknownFunction 0x00007ffcba9ad87b embree.dll!UnknownFunction 0x00007ffcba9c8c00 embree.dll!UnknownFunction 0x00007ffd59849f3a tbb.dll!UnknownFunction 0x00007ffcba9c8d7f embree.dll!UnknownFunction 0x00007ffd59849f3a tbb.dll!UnknownFunction 0x00007ffcba9c8d7f embree.dll!UnknownFunction 0x00007ffd59849f3a tbb.dll!UnknownFunction 0x00007ffcba9c8d7f embree.dll!UnknownFunction 0x00007ffd59849f3a tbb.dll!UnknownFunction 0x00007ffcba9c8d7f embree.dll!UnknownFunction 0x00007ffd59849f3a tbb.dll!UnknownFunction 0x00007ffcba9c8d7f embree.dll!UnknownFunction 0x00007ffd59849f3a tbb.dll!UnknownFunction 0x00007ffcba9ad9ef embree.dll!UnknownFunction 0x00007ffcba9ab89c embree.dll!UnknownFunction 0x00007ffcba5a8dcb embree.dll!UnknownFunction 0x00007ffcba4c08c9 embree.dll!UnknownFunction 0x00007ffd59849f3a tbb.dll!UnknownFunction 0x00007ffd5984749e tbb.dll!UnknownFunction 0x00007ffcba4bfea7 embree.dll!UnknownFunction 0x00007ffcba4feafe embree.dll!UnknownFunction 0x00007ffcba4fe99f embree.dll!UnknownFunction 0x00007ffcba4fe400 embree.dll!UnknownFunction 0x00007ffd59849f3a tbb.dll!UnknownFunction 0x00007ffd5984749e tbb.dll!UnknownFunction 0x00007ffcba4fe223 embree.dll!UnknownFunction 0x00007ffd59849f3a tbb.dll!UnknownFunction 0x00007ffcba4ff3a6 embree.dll!UnknownFunction 0x00007ffd598456da tbb.dll!UnknownFunction 0x00007ffcba4fce70 embree.dll!UnknownFunction 0x00007ffcba4d7894 embree.dll!UnknownFunction 0x00007ff6f234b3ab UnrealLightmass.exe!Lightmass::FEmbreeAggregateMesh::PrepareForRaytracing() 0x00007ff6f237254b UnrealLightmass.exe!Lightmass::FStaticLightingSystem::FStaticLightingSystem() 0x00007ff6f23205d6 UnrealLightmass.exe!Lightmass::BuildStaticLighting() 0x00007ff6f2346e63 UnrealLightmass.exe!Lightmass::LightmassMain() 0x00007ff6f2369def UnrealLightmass.exe!main() 0x00007ff6f23d5258 UnrealLightmass.exe!\_\_scrt\_common\_main\_seh() 0x00007ffd6ccc7374 KERNEL32.DLL!UnknownFunction this error occurred when building one of the levels ---
**Author:** ![FrostyJas](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/frostyjas/32/1194640_2.png) [@FrostyJas](https://forums.unrealengine.com/u/FrostyJas)\ **Post date:** [February 18, 2025, 8:27am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/6 "2025-02-18T08:27:22Z")
I see. Do you run an NVIDIA Card by chance? (GPU) ---
**Author:** ![NailV123](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NailV123](https://forums.unrealengine.com/u/NailV123)\ **Post date:** [February 18, 2025, 9:22am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/8 "2025-02-18T09:22:44Z")
No, I have it from manufacturers AMD (Amd Radeon Rx 5500 Rt (8GB)) ---
**Author:** ![FrostyJas](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/frostyjas/32/1194640_2.png) [@FrostyJas](https://forums.unrealengine.com/u/FrostyJas)\ **Post date:** [February 24, 2025, 5:33am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/9 "2025-02-24T05:33:53Z")
Do you run anything like ROCm, GPUOpen, or Adrenalin? I was going to recommend trying resetting your GPU settings to global default(Or the AMD equiv. I’m used to NVIDIA CP) Also, try removing any ‘Saved’ or ‘Intermediate’ folders in your project folders. Especially if it’s only one of the levels causing this. ---
**Author:** ![NailV123](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NailV123](https://forums.unrealengine.com/u/NailV123)\ **Post date:** [February 24, 2025, 12:09pm UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/10 "2025-02-24T12:09:04Z")
I have AMD and downloaded adrenalin And where should the intermediate and temporary folders be? ---
**Author:** ![NailV123](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NailV123](https://forums.unrealengine.com/u/NailV123)\ **Post date:** [February 24, 2025, 12:15pm UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/11 "2025-02-24T12:15:30Z")
Hello we managed to solve the problem by creating the cache folder that it asks for and then using SwarmAgent to set this folder as the default for the cache ---
**Author:** ![FrostyJas](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/frostyjas/32/1194640_2.png) [@FrostyJas](https://forums.unrealengine.com/u/FrostyJas)\ **Post date:** [February 25, 2025, 8:08am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/12 "2025-02-25T08:08:01Z")
Ah, right on! Well, I’m glad that you got it working! ---
**Author:** ![NailV123](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NailV123](https://forums.unrealengine.com/u/NailV123)\ **Post date:** [February 25, 2025, 11:46am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/13 "2025-02-25T11:46:38Z")
Hi @FrostyJas ! Thank you, good luck! ---
**Author:** ![FrostyJas](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/frostyjas/32/1194640_2.png) [@FrostyJas](https://forums.unrealengine.com/u/FrostyJas)\ **Post date:** [March 3, 2025, 5:30am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/14 "2025-03-03T05:30:38Z")
Same to you. Have a good week! ---
**Author:** ![system](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/1/3/713c9d3f58553f0de89543d76a8a3a2779dc9fa4.png) [@system](https://forums.unrealengine.com/u/system)\ **Post date:** [April 2, 2025, 5:31am UTC](https://forums.unrealengine.com/t/how-to-enable-it-swarm/2336756/15 "2025-04-02T05:31:10Z")
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