Upload Service (and Avatar Service) fail with null reference exception when uploading.

Question

In my latest attempt I switched over to using the Upload Service for this one, but I tried previously with the Avatar Service and was fairly certain that it was the same error. I get a null reference exception however as near as I can tell none of the values being passed to the upload function are null (see debug values below).

Using Unity 3D and C#.

Error Message:

NullReferenceException: Object reference not set to an instance of an object

StudentEditor.SaveAvatarPortrait (System.String filename, ClassMembership m, UserStudent s) (at Assets/LootAssets/Scripts/Controllers/StudentEditor.cs:345)

StudentEditor.SaveAvatarChanges () (at Assets/LootAssets/Scripts/Controllers/StudentEditor.cs:262)

UnityEngine.Events.InvokableCall.Invoke () (at <3dc54541a2574ac7826a004a212a4332>:0)

UnityEngine.Events.UnityEvent.Invoke () (at <3dc54541a2574ac7826a004a212a4332>:0)

UnityEngine.UI.Button.Press () (at C:/Program Files/Unity/Hub/Editor/2019.4.1f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/UI/Core/Button.cs:68)

UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at C:/Program Files/Unity/Hub/Editor/2019.4.1f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/UI/Core/Button.cs:110)

UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at C:/Program Files/Unity/Hub/Editor/2019.4.1f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:50)

UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at C:/Program Files/Unity/Hub/Editor/2019.4.1f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:261)

UnityEngine.EventSystems.EventSystem:Update() (at C:/Program Files/Unity/Hub/Editor/2019.4.1f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/EventSystem.cs:377)

Here is some debug output on the values being passed:

StudentEditor.SaveAvatarPortrait(tlcc-au-nsw-000.tlcc-au-nsw-000-casejustin2023.0000-9999-TESTCLASS)

Filename: tlcc-au-nsw-000.tlcc-au-nsw-000-casejustin2023.0000-9999-TESTCLASS.png

Description: Justin's avatar. (Class: 0000-9999-TESTCLASS, School: tlcc-au-nsw-000) [tlcc-au-nsw-000-casejustin2023]

Stream Length: 74883

 

UnityEngine.Debug:Log(Object)

StudentEditor:SaveAvatarPortrait(String, ClassMembership, UserStudent) (at Assets/LootAssets/Scripts/Controllers/StudentEditor.cs:340)

StudentEditor:SaveAvatarChanges() (at Assets/LootAssets/Scripts/Controllers/StudentEditor.cs:262)

UnityEngine.EventSystems.EventSystem:Update() (at C:/Program Files/Unity/Hub/Editor/2019.4.1f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/EventSystem.cs:377)

Also from the App42 Log:

GetInstance Not Null 

UnityEngine.Debug:Log(Object)

com.shephertz.app42.paas.sdk.csharp.App42Log:Console(String)

com.shephertz.app42.paas.sdk.csharp.connection.RESTConnectorWWW:GetInstance()

com.shephertz.app42.paas.sdk.csharp.upload.UploadService:UploadFile(String, Stream, String, String, App42CallBack)

StudentEditor:SaveAvatarPortrait(String, ClassMembership, UserStudent) (at Assets/LootAssets/Scripts/Controllers/StudentEditor.cs:346)

StudentEditor:SaveAvatarChanges() (at Assets/LootAssets/Scripts/Controllers/StudentEditor.cs:262)

UnityEngine.EventSystems.EventSystem:Update() (at C:/Program Files/Unity/Hub/Editor/2019.4.1f1/Editor/Data/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/EventSystem.cs:377)

 

Here is the latest version of my code:

if (thumbnailTexture != null)
        {
            // Remember currently active render texture
            RenderTexture currentActiveRT = RenderTexture.active;

            // Set the supplied RenderTexture as the active one
            RenderTexture.active = thumbnailTexture;

            // Create a new Texture2D and read the RenderTexture image into it
            Texture2D tex = new Texture2D(thumbnailTexture.width, thumbnailTexture.height);
            tex.ReadPixels(new Rect(0, 0, tex.width, tex.height), 0, 0);

            // Restorie previously active render texture
            RenderTexture.active = currentActiveRT;

            byte[] bytes = tex.EncodeToPNG();
            if (bytes.Length <= 0)
            {
                Debug.LogError("StudentEditor.SaveAvatarPortrait(" + filename + ") :: bytes array error");
                return;
            }

            System.IO.Stream stream = new System.IO.MemoryStream(bytes);
            if (stream == null)
            {
                Debug.LogError("StudentEditor.SaveAvatarPortrait(" + filename + ") :: stream == NULL");
                return;
            }

            // Upload to App42
            Debug.Log(
                "<color=yellow>StudentEditor.SaveAvatarPortrait(" + filename + ")</color>\r\n"
                + "Filename: " + filename + ".png\r\n"
                + "Student: " + s.firstName + "\r\n"
                + "Class: " + m.classID + "\r\n"
                + "Stream Length: " + stream.Length + "\r\n"
            );
            uploadService.UploadFile(filename, stream, "image", s.firstName+"'s avatar. (Class: "+m.classID+", School: "+s.schoolID+") ["+s.ssID+"]", new UploadAvatarPortraitCallBack());
        }