# Unreal 4.15 - Swarm Agent failed to kick off

**URL:** <https://forums.unrealengine.com/t/unreal-4-15-swarm-agent-failed-to-kick-off/390275>\
**Category:** Rendering\
**Tags:** building-lighting, swarm-agent, unreal-engine, question\
**Created:** [April 7, 2017, 5:22pm UTC](https://forums.unrealengine.com/t/unreal-4-15-swarm-agent-failed-to-kick-off/390275 "2017-04-07T17:22:27Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Tim\_Hobson](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Tim\_Hobson](https://forums.unrealengine.com/u/Tim_Hobson)\
**Post date:** [April 7, 2017, 7:42pm UTC](https://forums.unrealengine.com/t/unreal-4-15-swarm-agent-failed-to-kick-off/390275/2 "2017-04-07T19:42:10Z")

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**‘C:\Users\AppData\Local\UnrealEngine\4.15\Saved\Swarm\SwarmCache\AgentStagingArea  
v1.CC2F0757AA2598765416D9CF7469EB09B77DA0D0.mtrlgz’ because it is being used by another process.**

> **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)**
>
> After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — https://unrealcommunity.wiki/! You will be able to find content from...

Follow along in that part of the Wiki I made to resolve your issue. Ultimately, once you know what process is being used that prevents Swarm from using the correct port you’ll need to solve that locally on your machine. This isn’t something that I’ll be able to really walk you through, so you’ll need to use Google and a little bit of digging. Hopefully that helps you figure out what’s going on. 🙂

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_[View the full topic](https://forums.unrealengine.com/t/unreal-4-15-swarm-agent-failed-to-kick-off/390275)._