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IndexOutOfRangeException: Index was outside the bounds of the array [USDU-328]

See original GitHub issue

Importing as game objects some of our USD assets now throws IndexOutORangeExceptions after commit dc87b25a3878cab9463311517909660f51bab0ed. This happens only when Import Preview Surface is selected for Materials in the Inspector.

Is this a known issue ?

Here’s the full stack trace from the Console:

IndexOutOfRangeException: Index was outside the bounds of the array.
Unity.Formats.USD.MeshImporter.ImportSkinning (System.String path, Unity.Formats.USD.SanitizedMeshSample usdMesh, UnityEngine.Mesh unityMesh, pxr.UsdSkelSkinningQuery skinningQuery) (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Runtime/Scripts/IO/Geometry/MeshImporter.cs:385)
Unity.Formats.USD.MeshImporter.BuildSkinnedMesh (System.String path, Unity.Formats.USD.SanitizedMeshSample usdMesh, Unity.Formats.USD.MeshImporter+GeometrySubsets geomSubsets, UnityEngine.GameObject go, Unity.Formats.USD.SceneImportOptions options, System.Boolean isDynamic, pxr.UsdSkelSkinningQuery skinningQuery) (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Runtime/Scripts/IO/Geometry/MeshImporter.cs:317)
Unity.Formats.USD.MeshImportStrategy+<Import>d__5.MoveNext () (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Runtime/Scripts/IO/Geometry/MeshImporter.cs:195)
Rethrow as ImportException: Error processing mesh <...>
UnityEngine.Debug:LogException(Exception)
Unity.Formats.USD.<Import>d__5:MoveNext() (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Runtime/Scripts/IO/Geometry/MeshImporter.cs:211)
Unity.Formats.USD.<BuildScene>d__9:MoveNext() (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Runtime/Scripts/IO/Scene/SceneImporter.cs:640)
Unity.Formats.USD.SceneImporter:BuildScene(Scene, GameObject, SceneImportOptions, PrimMap, Boolean) (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Runtime/Scripts/IO/Scene/SceneImporter.cs:332)
Unity.Formats.USD.SceneImporter:ImportUsd(GameObject, Scene, PrimMap, Boolean, SceneImportOptions) (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Runtime/Scripts/IO/Scene/SceneImporter.cs:307)
Unity.Formats.USD.SceneImporter:ImportUsd(GameObject, Scene, PrimMap, SceneImportOptions) (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Runtime/Scripts/IO/Scene/SceneImporter.cs:269)
Unity.Formats.USD.UsdAsset:Reload(Boolean) (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Runtime/Scripts/Behaviors/UsdAsset.cs:565)
Unity.Formats.USD.UsdAssetEditor:ReloadFromUsd(UsdAsset, Boolean) (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Editor/Scripts/Behaviors/UsdAssetEditor.cs:324)
Unity.Formats.USD.UsdAssetEditor:OnInspectorGUI() (at C:/Users/nicolas.popravka/USD Unity SDK/package/com.unity.formats.usd/Editor/Scripts/Behaviors/UsdAssetEditor.cs:128)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)