I have one button and the text in button is the change in value of Sync-variable from all the player . If changes in host is made the value of button is changed in all client but changes in client is not respondind.

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.UI; using UnityEngine.Networking;

     public class gamecode :NetworkBehaviour {
 [SyncVar(hook="Updateval")]
 public string a;
 public Button b1;
 int i=0,j=0;

 void Update () {
     
     b1.GetComponentInChildren<Text> ().text = a;
 }

 public void buttononclick()// this is button on click event 
 {
     if (!isServer) {
         string p = "client";/// want to put the button value if client button is clicked (not responding)

         Cmdchangename (p);

     } else {
         a = "server";/// want to put the button value if client button is clicked(it is responding)

     }
 }

 [Command]
 public void Cmdchangename( string newname)
 {
     a = newname;

 }

 void Updateval (string newVal) {
     a = newVal;

 }

}