[UE4]No owning connection for actor XXX. Function XXX will not be processed

keywords：UE4, Dedicated Server, Replication

Issue

Client execute a server function failed:

LogNet: Warning: UIpNetDriver::ProcesRemoteFunction: No owning connection for actor TopDownCharacter_C_0. Function ServerMoveToDest will not be processed.

Caused by:
Because the Actor which invoking server function on client doesn’t have Connection.

Solution:
How to let object have Connection?

• For Character, possess it using PlayerController on server after spawning this Actor on server. AController::Possess(APawn* InPawn) example
• For Actor, Set an owner which has connection (e.g. a Character that has been possessed by PlayerController) on server. AActor::SetOwner(AActor* NewOwner) example

Notices for Dedicated Server

• Properties which be flagged as Replicated can only be modified on Server, Modifing on client doesn’t take effect.
• Clients can only communicate with Server, Clients can’t communicate with each other client directly.
• If Client want to invoke a Server Function, it must be spawned on Server and has the Connection, otherwise invoking would be failed.

最高贵的复仇是宽容。──维克多·雨果（Hugo Victor）