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1
Question by greay · Jul 03, 2020 at 11:10 PM · assetbundle

Can't get manifest of AssetBundleRequest

I'm troubleshooting our IAP system, which is meant to load the asset bundle from the cache if it's cached, otherwise download it remotely. I'm following the suggestions here: Get Hash128 from AssetBundle for the Caching.IsVersionCached function but I'm having trouble loading the AssetBundleManifest to get the hash in the first place.

 try {
     bundle = DownloadHandlerAssetBundle.GetContent(www);
 
     AssetBundleRequest request = bundle.LoadAssetAsync<AssetBundleManifest>(bundle.name);
 
     //Get the AssetBundleManifest
     AssetBundleManifest loadedAssetMf = request.asset as AssetBundleManifest;
     if (loadedAssetMf == null) Debug.LogError("could not get manifest");
     //Get Hash128 from the AssetBundleManifest
     Hash128 tempHash128 = loadedAssetMf.GetAssetBundleHash("");
     Prefs.SetString(cacheKey, tempHash128.ToString());
 }
 catch (Exception e) {
     Debug.LogErrorFormat("Error downloading asset bundle: {0}", e);
 }

This logs "could not get manifest" and then the NullRefException is caught.

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