UKismetSystemLibrary::RaiseScriptError

function Engine Blueprint Since unknown

#include "Kismet/KismetSystemLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintCallable

Description

Raises a Blueprint exception with the given message, logged to the Output and Message Log with information about where it was raised.

• Marked DevelopmentOnly — this is compiled out entirely in Test and Shipping builds (guarded by `#if !(UE_BUILD_TEST || UE_BUILD_SHIPPING)`), so it must never be relied on for runtime error handling that needs to occur in a shipped game.
• In the editor it throws a Blueprint exception via FBlueprintCoreDelegates::ThrowScriptException (visible in the Blueprint debugger); in non-editor development builds it only logs an error and stack trace instead — behaviour differs by build configuration, not just by whether it compiles out.

static void RaiseScriptError(const FString& ErrorMessage = FString(TEXT("An error occurred")))

Name	Type	Description	Default
ErrorMessage	const FString&	The error message to display.	"An error occurred"

void

Raise a custom Blueprint error C++

if (!TargetActor)
{
    UKismetSystemLibrary::RaiseScriptError(TEXT("TargetActor was null in AbilityActivation"));
    return;
}

Introduced in: unknown

Version	Status	Notes
5.6	stable	—

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