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cb3ar1
New Participant
October 14, 2025
Solved

Retargeting Configuration Editor no longer works

Following the directions for Body Tracking for Movement SDK, everything works fine until you get to this section: https://developers.meta.com/horizon/documentation/unity/move-body-tracking/#import-a-character 

I am using a MakeHuman character with a game engine rig (basic rig) 

These seem to be correct from videos/documentation.

The next screen, none of the preview sequences work

As well, there are several errors that happen when the mouse moves across the 3D model view

Errors:

 

1. IndexOutOfRangeException: Index -1 is out of range of '195' Length.
Unity.Collections.NativeArray`1[T].FailOutOfRangeError (System.Int32 index) (at <7b8172fcdd864e17924794813da71712>:0)
Meta.XR.Movement.Retargeting.SkeletonRetargeter.Update (Unity.Collections.NativeArray`1[T] sourcePose, System.String manifestation) (at ./Library/PackageCache/com.meta.xr.sdk.movement@b0553630bc45/Runtime/Native/Scripts/Retargeting/SkeletonRetargeter.cs:405)
Meta.XR.Movement.Retargeting.CharacterRetargeter.CalculatePose (Unity.Collections.NativeArray`1[T] sourcePose) (at ./Library/PackageCache/com.meta.xr.sdk.movement@b0553630bc45/Runtime/Native/Scripts/Retargeting/CharacterRetargeter.cs:292)
Meta.XR.Movement.Editor.MSDKUtilityEditorPreviewer.DrawPreviewCharacter () (at ./Library/PackageCache/com.meta.xr.sdk.movement@b0553630bc45/Editor/Native/Scripts/MSDKUtilityEditorPreviewer.cs:217)
Meta.XR.Movement.Editor.MSDKUtilityEditorWindow.UpdateSkeletonDraws () (at ./Library/PackageCache/com.meta.xr.sdk.movement@b0553630bc45/Editor/Native/Scripts/MSDKUtilityEditorWindow.cs:1248)
Meta.XR.Movement.Editor.MSDKUtilityEditorWindow.OnSceneGUI (UnityEditor.SceneView sceneView) (at ./Library/PackageCache/com.meta.xr.sdk.movement@b0553630bc45/Editor/Native/Scripts/MSDKUtilityEditorWindow.cs:517)
UnityEditor.SceneView.CallOnSceneGUI () (at <8081513dc2364383b8289d30d2169b2e>:0)
UnityEditor.SceneView.HandleSelectionAndOnSceneGUI () (at <8081513dc2364383b8289d30d2169b2e>:0)
UnityEditor.SceneView.DoOnGUI () (at <8081513dc2364383b8289d30d2169b2e>:0)
UnityEditor.SceneView.OnSceneGUI () (at <8081513dc2364383b8289d30d2169b2e>:0)
UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize, System.Action onGUIHandler, System.Boolean canAffectFocus) (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e, UnityEngine.Matrix4x4 worldTransform, UnityEngine.Rect clippingRect, System.Action onGUIHandler, System.Boolean canAffectFocus) (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.IMGUIContainer.DoIMGUIRepaint () (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.UIR.RenderChainCommand.ExecuteNonDrawMesh (UnityEngine.UIElements.UIR.DrawParams drawParams, System.Single pixelsPerPoint, System.Exception& immediateException) (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
Rethrow as ImmediateModeException
UnityEngine.UIElements.UIR.RenderTreeManager.RenderSingleTree (UnityEngine.UIElements.UIR.RenderTree renderTree, UnityEngine.RenderTexture nestedTreeRT, UnityEngine.RectInt nestedTreeViewport) (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.UIR.RenderTreeManager.RenderRootTree () (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.UIRRepaintUpdater.Render () (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.BaseVisualElementPanel.Render () (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.Panel.Render () (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.UIElementsUtility.DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.UIElementsUtility.UnityEngine.UIElements.IUIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& eventHandled) (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.UIEventRegistration.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.UIElements.UIEventRegistration+<>c.<.cctor>b__1_2 (System.Int32 i, System.IntPtr ptr) (at <58affde3b6cc47f39fa7e8b94d5890c0>:0)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& result) (at <9fed903c750c40ad88e137acb27455b3>:0)

2. GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

These errors persist after closing the configuration editor.

 

Thank you for reading and for all of these components and hard work put into making a great developer experience! 

 

cb3ar1Answer
New Participant
October 16, 2025

I realize now I just needed to actually properly add the bones in the configuration editor and then add the Character Retargeter and the meta source data provider and it worked, however I am going to leave this post because those errors are still happening in the editor after using the Retargeter configuration editor. Thank you!

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1 reply

cb3ar1AuthorAnswer
New Participant
October 16, 2025

I realize now I just needed to actually properly add the bones in the configuration editor and then add the Character Retargeter and the meta source data provider and it worked, however I am going to leave this post because those errors are still happening in the editor after using the Retargeter configuration editor. Thank you!

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