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Fixed in 2019.3.X



Found in





Issue ID




Errors "Bone index is not within the number of bones" are thrown when render.sharedMesh.boneWeights is set to null

Graphics - General


How to reproduce:
1. Open the attached project ("")
2. Reimport the "male_body.fbx" asset
3. Inspect console

Expected results: No errors in the console
Actual results: "Bone index is not within the number of bones" errors are thrown

Reproducible with: 2019.1.0a9, 2019.1.8f1, 2019.2.0b8, 2019.3.0a8
Not reproducible with: 2017.4.29f1, 2018.4.3f1, 2019.1.0a8

Comments (3)

  1. frozenpepper

    Jun 03, 2023 21:37

    Started getting this recently (Unity 2022.3.0f1 and 2021.3.26f1) and in my case it is related to EasyDecal. Brute forced a solution by using "EditorUtility.CollectDependencies()" to gather the SkinnedMeshRenderers EasyDecal references internally and destroying them. Can now build again. I'm not using Skinned Decals so don't know if solution would work in that case too.

  2. kbm

    Apr 17, 2021 21:35

    I am still getting this error in Unity 2020.3.3f1 in combination with the EasyDecal plugin.
    Any help would be greatly appreciated!

  3. andyasj

    Aug 26, 2019 08:11

    This issue in android build 2019.1.6f1

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