Unreal Engine 4.8 Preview

I updated to preview one and spent a day getting everything working with it. Everything was fine.

It updates with preview 2 yesterday, and has broke my project, Just hours before a huge meeting with one of our partners.

Our game is VR and we are using latest oculus run time. We have had no problems up to now with all version changes, but this preview 2 has me stumped!

One of nodes is now missing in preview 2 - “Get Base Rotation and position offset” It says function is not compiled?

This may be root cause of problem, or it may be something else.

Some advice would be really helpful at this point, or if we can get back to preview 1 where everything was fine.

This is urgent, so any help would be appreciated.