How fix error T15428


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Hello, I have a error: "Error, T15428: FindInvalidDataProcess fails on mesh normals: Found zero-length vector", when game converts mesh from FBX to trainzmesh. This error only lod0. I found mesh, where is this error. But, I don't know how fix it. Trainz Wiki hasn't information about this error. I use for export to TRS19 Blender 3.0. Plaese tell me: how fix it? I hope that community help solve fix this error. Thanks.
I fixed error.
This error fix in Blender: select mesh - push buttom tab, next - push buttom "A", next - push buttom "M" - select "by distance".
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