# Why does UE crash when I build lighting

**URL:** <https://forums.unrealengine.com/t/why-does-ue-crash-when-i-build-lighting/319958>\
**Category:** Rendering\
**Tags:** lighting-error, unreal-engine, crash, lighting-problem, Lighting, question\
**Created:** [May 27, 2015, 10:34pm UTC](https://forums.unrealengine.com/t/why-does-ue-crash-when-i-build-lighting/319958 "2015-05-27T22:34:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sakers288\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@sakers288\_1](https://forums.unrealengine.com/u/sakers288_1)\
**Post date:** [May 27, 2015, 10:34pm UTC](https://forums.unrealengine.com/t/why-does-ue-crash-when-i-build-lighting/319958/1 "2015-05-27T22:34:18Z")

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Whenever I go to rebuild my lighting, even on the simplest flat planes, UE continues to crash around 34%. I updated my drivers and searched around the forums but now I’m pretty stumped on what causing this. Any help would be great.

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**Author:** ![Lovecraft\_K](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Lovecraft\_K](https://forums.unrealengine.com/u/Lovecraft_K)\
**Post date:** [May 28, 2015, 4:50pm UTC](https://forums.unrealengine.com/t/why-does-ue-crash-when-i-build-lighting/319958/2 "2015-05-28T16:50:17Z")

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Hi sakers288 -

Have you tried to build lighting in the current Preview Release (Preview 4)?

Let me know if the issue has persisted into Preview 4 for you and if you can include the Callstack and Machine ID which appears in the Crash Reporter that would help us narrow the issue down.

Thank You

Eric Ketchum