Photon Network Cant Destroy Game Object In All Clients

Function that You use to destroy game object must be marked as an RPC before it can be invoked remotely.

For example:

 void myFunction() {
     //code...
 }

should be:

C#

 [RPC]
 void myFunction() {
     //code...
 }

JS

 @RPC
 function myFunction() {
     //code...
 }

Following code invokes an RPC function:

 networkView.RPC ("myFunction", RPCMode.AllBuffered);

If You have to pass variables to the function, just type it after RPC.Mode.AllBuffered and comma. For example:

 networkView.RPC ("myFunction", RPCMode.AllBuffered, myVariable);

You can read more about RPC here: http://docs.unity3d.com/Manual/net-RPCDetails.html

C#

 //function used to destroy game object
 [RPC]
 void networkDestroy(GameObject gO) {
     Destroy(gO);
 }
  
 // calling the RPC
 photonView.RPC("networkDestroy", PhotonTargets.All, objectToDestroy);

Here are some basic information about networking using Photon: http://doc.exitgames.com/th/pun/current/getting-started/pun-intro

I used PhotonTargets.All to send this information to all (clients and server), but You can specify who will receive this RPC. You can read more about this here: Photon Documentation

I've got this code:

 public void OnTriggerEnter(Collider col){
 
         if(col.gameObject.tag=="Knife")
 photonView.RPC("networkDestroy", PhotonTargets.All, transform.parent.gameObject);
 }
 
 [RPC]
     public void Die(GameObject parent)
     {    Destroy (parent);
 
     }

but it seems to doesnt work. It gives me this error

Exception: cannot serialize(): UnityEngine.GameObject ExitGames.Client.Photon.Protocol.Serialize (System.IO.MemoryStream dout, System.Object serObject, Boolean setType)