Not gonna lie, that is an extremely odd naming scheme. “Pistol Hit” is actually a reference to your 3rd person character enemy and the “Hit” variable is located in “3rd Person Character Enemy_2”. So a couple things could be wrong with that reference you might not be referencing the exact 3rd person BP you think, the “enemy_2” seems to suggest you have multiple similarly named BPs. Additionally where did you actually “create” the reference? You should have had a cast node or overlap or something to make that reference variable actually point to something. As it stands looks like you just hit the “variable +” button on the left side panel and created a variable with no actual reference to an in game object. You can’t make object references the way you would a boolean or integer variable.