For transfering data, it’s better to use Cast/Interface. If you said that the cast doesn’t work, do you already put the target to cast?
For your current transfer, it won’t work. Here is your situation. The event is on ABP, and you call it from the widget without giving the right target.
As you can see on the node itself, Body Scaling, Target is Scale Sliders
By that, what Unreal trying to do is executing “Body Scaling” on Scale Sliders (it just like executing an event that doesn’t exist in itself), which is not what you want.
If you want to try, give the right target, in your case, your ABP. Idk will it work or not since I’m not mainly a blueprint user. Idk can you transfer data use normal event like that, the things that I know is Cast or Interface will work if you handle it correctly.