--- a/rep/handler/Editor.java	Sat Sep 11 16:55:31 2010 +0900
+++ b/rep/handler/Editor.java	Sat Sep 11 17:54:04 2010 +0900
@@ -17,7 +17,7 @@
 
 	private Translator translator;
 	// REPCommands we are going to send to the next editor
-	private List<REPCommand> sentList = new LinkedList<REPCommand>();
+	private LinkedList<REPCommand> sentList = new LinkedList<REPCommand>();
 	protected LinkedList<PacketSet> waitingCommandInMerge= new LinkedList<PacketSet>();
 	private REPCommand quit2=null;
 	private boolean merging;
@@ -222,8 +222,7 @@
 	 * @param command
 	 */
 	void checkReturnedCommand(REPCommand command) {
-		if (checkAck(command))
-			startMerge(command);
+		startMerge(command);
 		return;
 	}
 
@@ -235,17 +234,18 @@
 //					command.cmd==REP.REPCMD_INSERT_ACK);
 //			return false;
 //		}
-//		REPCommand prev = sentList.get(0);
+		REPCommand prev = sentList.pollFirst();
 //		// ServerMainLoop.logger.writeLog("Editor eid="+eid+" remove sentList:"+(prev==null?"null":prev));
-//		if (prev==null || prev.seq != command.seq || prev.eid!=command.eid) {
-//			String err = "Editor eid="+eid+" checkReturnedCommand() : command = " + command + " prev="+
-//				(prev==null?"null":prev)+" sentList=";
-//			err += sentList;
-//			ServerMainLoop.logger.writeLog(err);
+		if (prev==null || prev.seq != command.seq || prev.eid!=command.eid) {
+			String err = "Editor eid="+eid+" checkReturnedCommand() : command = " + command + " prev="+
+				(prev==null?"null":prev)+" sentList=";
+			err += sentList;
+			ServerMainLoop.logger.writeLog(err);
+			assert(false);
 //			assert(command.cmd==REP.REPCMD_DELETE_ACK||
 //					command.cmd==REP.REPCMD_INSERT_ACK);
 //			return false;
-//		}
+		}
 		return true;
 	}
 

--- a/rep/handler/Translator.java	Sat Sep 11 16:55:31 2010 +0900
+++ b/rep/handler/Translator.java	Sat Sep 11 17:54:04 2010 +0900
@@ -86,12 +86,12 @@
 	 * @return if any sent commands output 
 	 */
 	public boolean optimizedSend(REPNode editor, LinkedList<REPCommand> output) {
+		sentMergedList.clear();
 		List<REPCommand> output1 = optimizer.optimize(output);
 		if (output1.size()==0) {
 			merge_mode = false;
 			return false;
 		}
-		assert(sentMergedList.size()==0);
 		for(REPCommand c:output1) {
 			REPCommand m = new REPCommand(c);
 			m.setEID(REP.MERGE_EID.id);
@@ -128,9 +128,9 @@
 	}
 	
 	/**
-	 * Translate Command cmd that was received from SeMa.
+	 * Translate Command  that was received from SeMa.
 	 * @param cmd the command to be translated.
-	 * @return translated commannd.
+	 * @return translated command.
 	 */
 	public void transReceiveCmd(REPNode nextEditor,REPCommand cmd){
 		assert (cmd.eid != eid);