AssetBundles: Linux - Hololens compatibility issue

Unity Engine
,
1

Hello Everyone,

I’ve been using Unity Linux edition to create Asset Bundles on a server side with standard:

BuildPipeline.BuildAssetBundles ("Assets/AssetBundles", BuildAssetBundleOptions.None, BuildTarget.StandaloneLinux);

When I download bundles in Unity Editor on Windows 10, everything works correctly and bundles are loaded, even if BuildTarget.StandaloneLinux suggest that Unity on Windows should complain. However I have enormous problems to get it working on Hololens app.

I realized that probably there should be a compatibility between asset bundle and an app build for Hololens - by that I mean that both should be WSA Player builds. The problem is that I tried several different releases for Linux, and with almost every one of them I was unable to successfully create bundles where BuildTarget is WSAPlayer:

BuildPipeline.BuildAssetBundles ("Assets/AssetBundles",BuildAssetBundleOptions.None,BuildTarget.WSAPlayer);

The errors were:

  • Unity 5.5.1.xf: Assertion failed on expression: ‘IsBuildTargetSupported’
  • Unity 5.6.2.f1: Assertion failed on expression: ‘IsBuildTargetSupported’
  • Unity 2017.1.0f3: Building an AssetBundle for target “MetroSupport” is not allowed because the required module is not installed.
  • Unity 2017.2.0xb: Building an AssetBundle for target "MetroSupport"is not allowed because the required module is not installed.
  • Unity 5.6.1xf - also tested, ufortunately didn’t save log.

The only version which managed to actually create asset bundle file was Unity 5.4.3. Hovewer I couldn’t download the asset neither in Unity editor on Windows nor on Hololens. The error was:
The asset bundle could not be loaded because it contains runtime classes of incompatibile versions.

I would appreciate any help.
I can share full logs or full code if necessary.

2

Sorry, Unity can’t build asset bundles for targets that aren’t supported (for deployment) on that platform.
(This also applies to Mac, for example.)

3

Thanks for the answer.
Is there a plan to change it in a future releases? Or is there any other approach other than asset bundles to download assets in the runtime?

4

Any updates on this?

1 Like