Valid AssetBundle Throws Null Reference Exception (NRE) With Any API Call

Hello

I have been converting my project from using the Resource folder to AssetBundles. I have tagged my scriptable objects in the "scriptableobjects" asset bundle, and I've loaded and stored that bundle in the "Assets/AssetBundles" folder.

Here the code where I build my assets:

Code (CSharp):

1.  
2.     [MenuItem("Assets/Build AssetBundles")]
3.     static void BuildAllAssetBundles()
4.     {
5.         string assetBundleDirectory = "Assets/AssetBundles";
6.         if (!Directory.Exists(assetBundleDirectory))
7.         {
8.             Directory.CreateDirectory(assetBundleDirectory);
9.         }
10.  
11.         //https://docs.unity3d.com/Manual/AssetBundles-Building.html
12.         BuildPipeline.BuildAssetBundles(assetBundleDirectory,
13.                                         BuildAssetBundleOptions.UncompressedAssetBundle,
14.                                         BuildTarget.StandaloneWindows);
15.     }

After building the assets, I then go to actually load these assets and their resources:

Code (CSharp):

1.  
2. using System;
3. using System.Collections;
4. using System.Collections.Generic;
5. using UnityEngine;
6.  
7. public class X_AssetBundleManager : MonoBehaviour
8. {
9.     private static Maps _maps;
10.     private static AssetBundle _scriptableObjectsBundle;
11.  
12.     public static T LoadScriptableObject<T>(string assetName) where T : ScriptableObject
13.     {
14.         if (_scriptableObjectsBundle == null)
15.         {
16.             AssetBundle _scriptableObjectsBundle = AssetBundle.LoadFromFile("Assets/AssetBundles/scriptableobjects");
17.             if (_scriptableObjectsBundle == null)
18.             {
19.                 Debug.Log("Failed to load 'scriptableobjects' AssetBundle!"); // Does not get called!,
20.                 return null;
21.             }
22.         }
23.  
24.         if (_scriptableObjectsBundle.Contains(assetName)) // NRE HERE
25.         {
26.             Debug.Log("DOES CONTAIN");
27.         }
28.         else
29.         {
30.             Debug.Log("DOES NOT CONTAIN");
31.         }
32.  
33.         try
34.         {
35.             var all = _scriptableObjectsBundle.LoadAllAssets<ScriptableObject>(); //NRE HERE
36.         }
37.         catch (Exception e)
38.         {
39.             Debug.LogError(e);
40.         }
41.  
42.         T obj = _scriptableObjectsBundle.LoadAsset<T>(assetName); //NRE HERE
43.         if (obj == null)
44.         {
45.             Debug.LogError("Failed to load " + assetName + "  in scriptableobjects");
46.         }
47.         return obj;
48.     }
49. }

The _scriptableObjects variable is not null. Its a valid object. However, calling ANY api on it causes a null reference exception.

I can't even step through the code to see whats null. The AssetBundle itself is not null, but any call causes this.

Any advice on how to further debug this issue or what the problem might be?

 

I was overriding my static, problem solved!

_scriptableObjectsBundle = AssetBundle.LoadFromFile("Assets/AssetBundles/scriptableobjects");
instead of

AssetBundle _scriptableObjectsBundle = AssetBundle.LoadFromFile("Assets/AssetBundles/scriptableobjects");