# Project crashes when transforming metahuman

**URL:** <https://forums.unrealengine.com/t/project-crashes-when-transforming-metahuman/489606>\
**Category:** Cinematics & Media\
**Tags:** assertion-failed, unreal-engine, crash, question, metahuman\
**Created:** [October 7, 2021, 3:44am UTC](https://forums.unrealengine.com/t/project-crashes-when-transforming-metahuman/489606 "2021-10-07T03:44:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Micoosa](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Micoosa](https://forums.unrealengine.com/u/Micoosa)\
**Post date:** [October 7, 2021, 3:44am UTC](https://forums.unrealengine.com/t/project-crashes-when-transforming-metahuman/489606/1 "2021-10-07T03:44:05Z")

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Hi,

I’m currently experiencing frequent crashing in UE4 while trying to move/rotate a MetaHuman character with retargetted Mixamo animations. Each time it crashes, this crash log comes up with the same failed assertion command:

Assertion failed: RootLOD == MeshComp-\>GetPostProcessInstance()-\>GetRequiredBones().GetCalculatedForLOD() [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/Animation/AnimInstance.cpp] [Line: 2863]

 ![350011-crash-log.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/9/e/7/9e74ecf62b4aff49102a1defb9d01880dfc2ccc5.png)

Any ideas on how to fix/avoid this crash?

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**Author:** ![IXXIIXXI1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@IXXIIXXI1](https://forums.unrealengine.com/u/IXXIIXXI1)\
**Post date:** [April 4, 2022, 2:31pm UTC](https://forums.unrealengine.com/t/project-crashes-when-transforming-metahuman/489606/2 "2022-04-04T14:31:03Z")

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Not sure if it’s the right way, but had the exact same problem with same error code.

I set the LOD to a fixed number in the MetaHuman\_BP, now it doesn’t crash anymore but I don’t know for how long it will hold up. Could be a quick fix, but since i can’t find anythin else online i thought i share it.

- MetaHuman Blueprint\> LODSync \> LOD \>
- Set Num LOD 1
- Forced LOD 1

 ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/1/1/1/1116542964b56cba167e755c945af9da872ed4fd.png)