When Disposing Engine: TypeError: Cannot read properties of undefined (reading 'vertexBuffers')

Bugs
1

Hi I dont have a reporo for this just yet but im wondering if anyone would have any clue why we are getting this error when disposing our Engine?

 TypeError: Cannot read properties of undefined (reading 'vertexBuffers')
    at Mesh._disposeInstanceSpecificData (instancedMesh.ts:791:47)
    at Mesh.dispose (mesh.ts:2481:14)
    at scene.ts:4059:55
    at Scene._disposeList (scene.ts:4158:13)
    at Scene.dispose (scene.ts:4059:14)
    at Engine.dispose (engine.ts:1878:28)
    at Engine.tsx:38:16
    at safelyCallDestroy (react-dom.development.js:22932:5)
    at commitHookEffectListUnmount (react-dom.development.js:23100:11)
    at commitPassiveUnmountInsideDeletedTreeOnFiber (react-dom.development.js:25098:11)

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Is there something about instancedMesh that we should know about when disposing?

We are running BabylonJS 6.9.0

2

It seems there is a problem with one of the instance buffer you create for your mesh.

Try to look at the names of the key of mesh._userInstancedBuffersStorage.vertexBuffers for the source mesh (the mesh from which you create the instances) and compare them to mesh.instancedBuffers: you should have at least one name in the latter which is not in the former. If that is so, this is not normal, maybe you are misusing this buffer?

3

Okay I found the issue, I was setting instance buffers on a mesh that wasnt an instanced mesh. This caused the engine to crash when it disposed…

Dont do this :stuck_out_tongue: