Node not pumping and screen not updating

An anim node plug-in I have based on an example was working. Since adding features it no longer shows as pumping and doesn’t update the screen. I don’t see any code in the old version of my plug-in to trigger a screen update. What did I break? How does UE know to call for an update after I’ve made bone data change in another thread? Is there a procedure for tracking down an issue like this?