When I upgraded from 4.0.2 to 4.1 I can no longer find the blueprint functions that controlled physics constraint components such as “Set Constrained Components” and the ones that control motors and limits.
Took a quick look at the C++ and the functions appear to be exposed. I’m still not sure why they don’t show up.
This is fallout from some categorization fixes that ran in to each other in unfortunate ways.
If you are able to compile your own C++ removing the Physics from the hidecategories portion of the UCLASS will resolve your issue in the short term.
Apologies for the inconvenience.