Question about BP interface, please help

Ah ok I understand what you mean, I will try to use the pure mode when possible to see if it make it working.
The BPI is not reached I already tryed. the gamemode BPI work but from the playercontroler not.
Thank you a lot

Edit :

in this configuration the TestAffectHeath work only in direct (the character that was hit) but not to the caractere that shot it (via the BPI) This work only on the same instance. Why it is working when I call the BPI from the gamemode and not If I call the same class in another instance ? ^^’

Edit 2

If I take it to the first place the same, in this case I only see the printed ID that are correct.

Edit 3

I Tryed another function test in another BPI (my character use 2 different BPI) and the same, not work. I really have a nocommunication with all BPI from the same class in different instances