Resolved Can't load generated .onnx file into Behavior Parameters with 3DBall example

training with the 3DBall example - training runs seemingly fine, generates 3DBall.onnx

Can't drag this file into BehaviorParameters Model field in inspector (prefab or instantiated agent).

Error in Barracuda code line 152
var isContinuousInt = (int)model.GetTensorByName(TensorNames.IsContinuousControl)[0];
appears as below:

Unity 2020.3.1f1

NullReferenceException: Object reference not set to an instance of an object
Unity.MLAgents.Inference.BarracudaModelParamLoader.CheckModel (Unity.Barracuda.Model model, Unity.MLAgents.Policies.BrainParameters brainParameters, Unity.MLAgents.Sensors.SensorComponent[] sensorComponents, Unity.MLAgents.Policies.BehaviorType behaviorType) (at Library/PackageCache/com.unity.ml-agents@1.0.7/Runtime/Inference/BarracudaModelParamLoader.cs:152)
Unity.MLAgents.Editor.BehaviorParametersEditor.DisplayFailedModelChecks () (at Library/PackageCache/com.unity.ml-agents@1.0.7/Editor/BehaviorParametersEditor.cs:108)
Unity.MLAgents.Editor.BehaviorParametersEditor.OnInspectorGUI () (at Library/PackageCache/com.unity.ml-agents@1.0.7/Editor/BehaviorParametersEditor.cs:68)
UnityEditor.UIElements.InspectorElement+<>c__DisplayClass59_0.<CreateIMGUIInspectorFromEditor>b__0 () (at <0fdaf67e8e744beea25e77915c19f81b>:0)
UnityEngine.GUIUtilityrocessEvent(Int32, IntPtr, Boolean&)

 

SOLVED - I was using Python release 26 with ml-agents Unity v1.07 and missed the warnings