WTF: Event Signature Error: The function/event 'xxx' does not match the necessary signature - has the delegate or function/event changed?

Development Programming & Scripting Blueprint
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1

I swear to god…
Alright, new one:

I have a CPP event that when assigned/binded in a BP says:

EventOnThrowGrapple_Event Signature Error: The function/event ‘EventOnThrowGrapple_Event’ does not match the necessary signature - has the delegate or function/event changed?

When and only when it is cabled to something that executes.

Here’s what I do in images:
How i assign:
1
When its assigned and compiled (no errors so far)
2
Error pops up only when I cable to (1), (2) warns nothing.

3
3749×593 79.2 KB

Here’s how the event is declared in cpp.

DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FEventDelegate_AGrapplinHook_OnThrowGrapple, AGrapplingHook*, self);

UCLASS(Blueprintable)
class TPSMPPG_API AGrapplingHook : public AActor
{
GENERATED_BODY()

public:
AGrapplingHook();

/---------------------------------/
/>>__________ EVENTS __________<</
UPROPERTY(BlueprintAssignable, Category = “Event Suscribers”)
FEventDelegate_AGrapplinHook_OnThrowGrapple EventOnThrowGrapple;

(more stuff)
}

For the love of god, what am i doing wrong?
Thanks

1 Like
2

Ok, got it. Dumb as always.
Cannot have fields called ‘self’ in an event declaration.
In my event I was doing:

DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FEventDelegate_AGrapplinHook_OnThrowGrapple, AGrapplingHook*, :exploding_head: :exploding_head:self :exploding_head::exploding_head:);

6 Likes
3

How did you find it out you genius!!