When attempting to serialize and save a jagged array it gives me an error message

Questions & Answers
1

Problem:
I have a script which creates an array, then it creates a jagged array, then a 3d jagged array (I think I got the names correct) Each array starting with the smallest is in the next. The “foreach” part is something I have been trying to do (Print array to console):

public void SaveWeights ()
    {

        //Creates a binaray formatter
        BinaryFormatter binaryFormatter = new BinaryFormatter();
        
        //FileStream saveFile = File.Create("C:/Users/user/Desktop" + neuronWeights[k] + ".sav");
        
        //Creates a filepath
        FileStream saveFile = File.Open("C:/Users/user/Desktop" + "/weightData.txt", FileMode.Open);
        
        //Creates a container for data
        WeightData weightData = new WeightData();
        weightData.saveWeights = saveWeights; //Sets the clean serializable data to local data
        
        //Writes container data to filepath
        binaryFormatter.Serialize(saveFile, saveWeights);
        saveFile.Close();

        //Debug.Log(saveWeights);

        foreach (float[][] i in saveWeights)
        {
            Debug.Log(i);
        }

    }

}

///Clean data which is serializable
[Serializable]
class WeightData
{
    public float[][][] saveWeights;
}

When I try to serialize then save the largest 3d jagged array it gives me this error:

ArgumentNullException: Argument cannot be null.
Parameter name: obj
System.Runtime.Serialization.ObjectIDGenerator.GetId (System.Object obj, System.Boolean& firstTime) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.Serialization/ObjectIDGenerator.cs:82)
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteObjectInstance (System.IO.BinaryWriter writer, System.Object obj, Boolean isValueObject) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/ObjectWriter.cs:284)
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteQueuedObjects (System.IO.BinaryWriter writer) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/ObjectWriter.cs:271)
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteObjectGraph (System.IO.BinaryWriter writer, System.Object obj, System.Runtime.Remoting.Messaging.Header[] headers) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/ObjectWriter.cs:256)
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize (System.IO.Stream serializationStream, System.Object graph, System.Runtime.Remoting.Messaging.Header[] headers) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/BinaryFormatter.cs:232)
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize (System.IO.Stream serializationStream, System.Object graph) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/BinaryFormatter.cs:211)
NeuralNetwork.SaveWeights () (at Assets/Scripts/NeuralNetwork/NeuralNetwork.cs:229)
UnityEngine.Events.InvokableCall.Invoke (System.Object[] args) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:154)
UnityEngine.Events.InvokableCallList.Invoke (System.Object[] parameters) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:637)
UnityEngine.Events.UnityEventBase.Invoke (System.Object[] parameters) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:773)
UnityEngine.Events.UnityEvent.Invoke () (at C:/buildslave/unity/build/Runtime/Export/UnityEvent_0.cs:52)
UnityEngine.UI.Button.Press () (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/Button.cs:36)
UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/Button.cs:45)
UnityEngine.EventSystems.ExecuteEvents.Execute (IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:50)
UnityEngine.EventSystems.ExecuteEvents.Execute[IPointerClickHandler] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.EventFunction`1 functor) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:261)
UnityEngine.EventSystems.EventSystem:Update()

Then right after that error it gives me this one:

IOException: Sharing violation on path C:\Users\user\Desktop\weightData.txt
System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/FileStream.cs:320)
System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share)
(wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
System.IO.File.Open (System.String path, FileMode mode) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/File.cs:347)
NeuralNetwork.SaveWeights () (at Assets/Scripts/NeuralNetwork/NeuralNetwork.cs:222)
UnityEngine.Events.InvokableCall.Invoke (System.Object[] args) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:154)
UnityEngine.Events.InvokableCallList.Invoke (System.Object[] parameters) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:637)
UnityEngine.Events.UnityEventBase.Invoke (System.Object[] parameters) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:773)
UnityEngine.Events.UnityEvent.Invoke () (at C:/buildslave/unity/build/Runtime/Export/UnityEvent_0.cs:52)
UnityEngine.UI.Button.Press () (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/Button.cs:36)
UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/Button.cs:45)
UnityEngine.EventSystems.ExecuteEvents.Execute (IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:50)
UnityEngine.EventSystems.ExecuteEvents.Execute[IPointerClickHandler] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.EventFunction`1 functor) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:261)
UnityEngine.EventSystems.EventSystem:Update()

Question:
Why is it giving me these errors?
How can I fix it?
Do I need to rewrite the structuring because of some problem I have not seen yet?

Notes:
I am calling the SaveWeights function from a canvas ui object.
I am using the MonoBehaviour class and the IComparable interface so:

public class NeuralNetwork : MonoBehaviour, IComparable<NeuralNetwork> {}

I do know that the “new” operator is not usable in MonoBehaviour class but it seems to work fine. It does however give me an error, but like I said it seems to work fine:

You are trying to create a MonoBehaviour using the 'new' keyword.  This is not allowed.  MonoBehaviours can only be added using AddComponent().  Alternatively, your script can inherit from ScriptableObject or no base class at all
UnityEngine.MonoBehaviour:.ctor()
NeuralNetwork:.ctor(Int32[]) (at Assets/Scripts/NeuralNetwork/NeuralNetwork.cs:18)
NeuralManager:InitBikeNeuralNetworks() (at Assets/Scripts/NeuralNetwork/NeuralManager.cs:153)
NeuralManager:Update() (at Assets/Scripts/NeuralNetwork/NeuralManager.cs:32)

I will post any scripts if anyone asks to see my code to find errors.

@aldonaletto

2

Hello, I read on your post 2 or 3 days ago for the same problem. “Nice ! One person who does the neural network on unity” … whatever the architecture of the programs seem to differ.

I followed this tutorial (in French) Réseau de neurones et génétique - Deep learning & algorithmes genetiques #3 - YouTube

And resumed the code linked to this tutorial: https://drive.google.com/file/d/11Z10vmuIxVCKBT7gAlbFQ2RlPuSgnKyI/view

I have seen similar errors circulating at times.

[Serializable]
 class WeightData
 {
     public float[][][] saveWeights;
 }

I had to add a constructor so that Unity is happy…

public class NeuralNetwork : IComparable<NeuralNetwork>
{


	public object SendWeightsToSave()
	{
		SerializableNeuralNetwork snn = new SerializableNeuralNetwork(weights, fitness);
		return snn;
	}

	public string ReceiveWeightsFromLoad()
	{
		return "";
	}

}

[System.Serializable]
public class SerializableNeuralNetwork
{
	public float[][][] weights;//matrice des poids
	public float fitness;       //fitness du reseau

	public SerializableNeuralNetwork(float[][][] patternWeights, float patternFitness)
	{
		weights = patternWeights;
		fitness = patternFitness;
	}
}

After doing this, I opted for a json backup and i use JSON NET. It seemed simpler …

(sorry for my approximate english)