What It Means & How to Fix It in UE5

---

🧠 Why You’re Seeing This Error

This error comes from Unreal Header Tool (UHT) — which processes your UCLASS, USTRUCT, UFUNCTION, and UPROPERTY macros. It means that UHT was expecting to find auto-generated .generated.h files, but they’re missing, unreadable, or not being generated correctly during the build.

This typically happens when:

• You forget to include the .generated.h file at the bottom of a header
• The file is present, but not listed in the .uproject or build target
• A build failure prevents the .generated.h from being created
• Your IDE or generator skipped UHT

---

💥 Example Error Message

UHT Error: Generated code not found. You may be missing MyClass.generated.h or it failed to compile.

---

🛠️ What Usually Causes This

❌ You Forgot to Include .generated.h in a UCLASS Header

// ❌ Missing at the end
#include "MyClass.h"

UCLASS()
class MYGAME_API AMyClass : public AActor
{
    GENERATED_BODY() // Will break without generated header
};

---

❌ You Included It in the Wrong Place

// ❌ Wrong (too early)
#include "MyClass.generated.h"
#include "CoreMinimal.h"

---

❌ UHT Didn’t Run Because the File Wasn’t in a Valid Module

Files outside a module’s Public/ or Private/ folder may be skipped by UHT.

---

❌ Project Files Are Out of Sync

You added a new .h file or class, but didn’t regenerate Visual Studio project files.

---

✅ How to Fix It – Step-by-Step

---

✔️ 1. Always Include the .generated.h File as the Last Include in the Header

#pragma once

#include "CoreMinimal.h"
#include "MyClass.generated.h" // ✅ Must be last include

UCLASS()
class MYGAME_API AMyClass : public AActor
{
    GENERATED_BODY()

public:
    AMyClass();
};

---

✔️ 2. Make Sure the Header Is Inside a Recognized Module

Valid locations include:

Source/MyGame/Public/MyClass.h
Source/MyGame/Private/MyClass.cpp

If your file is outside a proper module, UHT won’t scan it.

---

✔️ 3. Regenerate Project Files

After adding new classes or modules:

// Do this:
- Right-click your .uproject
- Select “Generate Visual Studio project files”
- Rebuild the solution

---

✔️ 4. Clean Intermediate Files and Try Again

Sometimes UHT gets confused by stale data. Clean up:

// Optional but recommended:
- Delete Intermediate/ and Binaries/ folders
- Rebuild the project from scratch

---

✅ Summary: How to Fix “UHT Error: Generated Code Not Found” in UE5

Cause	Fix
.generated.h file missing	Add #include "MyClass.generated.h" as the last include
Incorrect header structure	Keep .generated.h at the bottom, after all other includes
File not in valid module folder	Move it to Public/ or Private/ under a recognized module
Project files not regenerated	Right-click .uproject → Generate project files
Stale or incomplete build state	Delete Intermediate/ and rebuild clean