Error in UnrealNetwork.h when using C++ Replication

Development Programming & Scripting
1

When I try to Follow The C++ Replication samples at A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums And Recreate the exact class at actor replication I get the following error in UnrealNetwork.h.

error: use of undeclared identifier 'FLogCategoryLogNet'
[2014.11.11-11.06.59:293][149]CompilerResultsLog: Info UE_LOG(LogNet, Fatal,TEXT("Attempt to replicate property '%s.%s' in C++ but class '%s' is not a child of '%s'"), *PropClass->GetName(), *PropName.ToString(), *CallingClass->GetName(), *PropClass->GetName());

My code looks as follows: ReplicatedActor.h

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once
#include "Core.h"
#include "GameFramework/Actor.h"
#include "ReplicatedActor.generated.h"

/**
 * 
 */
UCLASS()
class DESOLATION_API AReplicatedActor : public AActor
{
	GENERATED_UCLASS_BODY()

public:
    
    /** A Replicated Boolean Flag */
    UPROPERTY(Replicated)
    uint32 bFlag:1;
    
    /** A Replicated Array Of Integers */
    UPROPERTY(Replicated)
    TArray<uint32> IntegerArray;
	
	
};

ReplicatedActor.cpp

// Fill out your copyright notice in the Description page of Project Settings.

#include "Desolation.h"
#include "ReplicatedActor.h"
#include "UnrealNetwork.h"

AReplicatedActor::AReplicatedActor(const class FPostConstructInitializeProperties& PCIP)
	: Super(PCIP)
{
    bReplicates = true;
}

void AReplicatedActor::GetLifetimeReplicatedProps(TArray<FLifetimeProperty> &OutLifetimeProps) const
{
    DOREPLIFETIME(AReplicatedActor, bFlag);
    DOREPLIFETIME(AReplicatedActor, IntegerArray);
}

I am using Engine version 4.5.1 on OSX 10.10 Yosemite

Is this a bug in the engine, or am I doing something wrong

2

Try putting

#include “UnrealNetwork.h”

in the .h file!

#pragma once

#include "UnrealNetwork.h"

#include "GameFramework/Actor.h"
#include "ReplicatedActor.generated.h"

Rama

3

Nope, still got the same errors
Also the generated headers should always be last in the include lines

4

You’re looking for this line that declares that Log variable

ENGINE_API DECLARE_LOG_CATEGORY_EXTERN(LogNet, Log, All);

It is defined in EngineLogs.h

Try making sure that is included, either directly, or via the nuclear option of the dreaded “engine.h”!

5

ah yea oops copy paste typo, well did you try what Josh suggested?

If you go into YourGame.h

are you using EngineMinimal or Engine.h?

Have you tried Engine.h?

6

This solved the compile error for me, that i got after including UnrealNetwork.h

7

Is there a reason why EngineLogs.h isn’t included by UnrealNetwork.h? Is it expected that people override this declaration?

8

Did you ever figure this out? I am experiencing this with a replicated variable running on a Linux server. Everything compiles fine but when it runs :

Attempt to replicate property ‘ObjectProperty /Script/…’ that was not tagged to replicate!