Index: group/RpcChannel.java
===================================================================
--- group/RpcChannel.java	(revision 792283)
+++ group/RpcChannel.java	(working copy)
@@ -42,6 +42,7 @@
     private Channel channel;
     private RpcCallback callback;
     private byte[] rpcId;
+    private int replyMessageOptions = 0;
     
     private HashMap responseMap = new HashMap();
 
@@ -125,7 +126,7 @@
             rmsg.reply = true;
             rmsg.message = reply;
             try {
-                channel.send(new Member[] {sender}, rmsg,0);
+                channel.send(new Member[] {sender}, rmsg, replyMessageOptions);
             }catch ( Exception x )  {
                 log.error("Unable to send back reply in RpcChannel.",x);
             }
@@ -136,7 +137,18 @@
         channel.removeChannelListener(this);
     }
     
-    public void finalize() {
+    
+    public int getReplyMessageOptions() {
+		return replyMessageOptions;
+	}
+
+
+	public void setReplyMessageOptions(int replyMessageOptions) {
+		this.replyMessageOptions = replyMessageOptions & ~Channel.SEND_OPTIONS_SYNCHRONIZED_ACK;
+	}
+
+
+	public void finalize() {
         breakdown();
     }