What It Means & How to Fix It

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🧠 Why You’re Seeing This Error

C2589 is a syntax error that means the compiler found something unexpected on the right-hand side of the :: scope operator — like a variable name instead of a type, or a typo.

In UE5, this often happens when:

• You try to use Class::Variable, but the variable isn’t static
• You misuse a macro or write invalid class/namespace syntax
• You forget to use an enum or static const properly

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💥 Example Error Message

error C2589: 'Health': illegal token on right side of '::'

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🛠️ Example Code

int32 Value = AMyActor::Health; // ❌ C2589: Health is not static

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✅ How to Fix C2589 in UE5 – Step-by-Step

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✔️ 1. Don’t Use :: with Non-Static Members

Fix:

AMyActor* Actor = GetWorld()->SpawnActor();
int32 Value = Actor->Health; // ✅ Use `->` or `.` for instance members

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✔️ 2. If It’s an Enum or Static Constant, Declare It Properly

If you’re using a class enum or static const, make sure it’s declared and defined correctly.

Wrong:

int32 Mode = EGameMode::Mode1; // ❌ Mode1 not declared properly

Fix:

UENUM()
enum class EGameMode : uint8
{
    Mode1,
    Mode2
};

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✔️ 3. Check for Typos or Misused Namespaces

Sometimes this is just a mistyped class or symbol name that the compiler misinterprets.

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✅ Summary: How to Fix C2589 in UE5

Cause	Fix Example
Using :: with non-static member	Use -> or . with object instances
Enum or constant incorrectly scoped	Declare/define with proper enum syntax
Typos or macro misuse	Double-check class names and token usage