The documentation states that Unity 5.3 should be backward compatible with bundles created in 5.x (http://docs.unity3d.com/Manual/UpgradeGuide53.html), but when I try to download bundles created in 5.x in Unity 5.3.0f4 (Build target: Windows Phone 8.1) I receive errors like:
The AssetBundle 'xxx.bundle' could not be loaded because it contains run-time classes of incompatible version
On the other side, when I create bundles in 5.3.0f4 they doesn’t work in 5.2.x. What might be the cause?
5.3.0 should be able to load 5.2.x asset bundles. 5.2.x cannot load 5.3.0 asset bundles.
The error message is saying that there is something in the AB that isn’t compatible. It’s hard to suggest what/why. The UpgradeGuide53 talks about Global Illumination changes, but that means nothing to me.
I think the reason is the bundle is for Windows Phone… So for metro, we don’t support type tree in the AssetBundle.
We really should mention this in the upgrade guide.
