using UnityEngine;
using System.Collections;

public class LoadFromCacheOrDownloadExample : MonoBehaviour
{
    IEnumerator Start()
    {
        var www = new WWW("proper/path/to/bundle");
        yield return www;
		// server do not returns error
        if (www.error != null)
        {
			// Unity 5.6b9 debugs this log error(not expected, as 'error' string is null),But not Unity 5.5
            Debug.Log(www.error);
            yield return null;
        }
        if(!string.IsNullOrEmpty(www.error))
        {
			// Both Unity5.6b9 and Unity5.5 do not reach here,as expected obviously
            Debug.Log(www.error);
        }
        var myLoadedAssetBundle = www.assetBundle;

        var asset = myLoadedAssetBundle.mainAsset;

		// Unity 5.6b9 and Unity5.5 reaches here,as expected
        Debug.Log("Bundle Loaded");
    }
}