diff --git a/src/com/eactive/eai/agent/command/Command.java b/src/com/eactive/eai/agent/command/Command.java
index e9e0301..1c852a4 100644
--- a/src/com/eactive/eai/agent/command/Command.java
+++ b/src/com/eactive/eai/agent/command/Command.java
@@ -24,10 +24,10 @@ public abstract class Command implements Serializable {
 	/** Command Arguments */
 	protected Object args;
 	
-	private HashMap<String,String> errorCode ;
+	private static final HashMap<String,String> errorCode = new HashMap<>();
 	
 	static {
-        errorCode = new HashMap<String,String>();
+        //HashMap<String,String> errorCode = new HashMap<String,String>();
         errorCode.put("RECEAIMCM001", "Command 이름[{1}] 유효하지 않은 파라메터 타입 - {2}");
         errorCode.put("RECEAIMCM002", "Command 이름[{1}] execute 메소드 실행중 에러가 발생 - {2}");		
 	}