diff --git a/sdk-demo/src/main/java/org/fisco/bcos/sdk/demo/amop/tool/DemoAmopResponseCallback.java b/sdk-demo/src/main/java/org/fisco/bcos/sdk/demo/amop/tool/DemoAmopResponseCallback.java
index 14784e77d..c585bde28 100644
--- a/sdk-demo/src/main/java/org/fisco/bcos/sdk/demo/amop/tool/DemoAmopResponseCallback.java
+++ b/sdk-demo/src/main/java/org/fisco/bcos/sdk/demo/amop/tool/DemoAmopResponseCallback.java
@@ -22,14 +22,15 @@ public void onResponse(AmopResponse response) {
                                 + " content:"
                                 + new String(response.getAmopMsgIn().getContent())
                                 + " }");
+            } else {
+                System.out.println(
+                        "Step 3:Get response, { errorCode:"
+                                + response.getErrorCode()
+                                + " error:"
+                                + response.getErrorMessage()
+                                + " seq:"
+                                + response.getMessageID());
             }
-            System.out.println(
-                    "Step 3:Get response, { errorCode:"
-                            + response.getErrorCode()
-                            + " error:"
-                            + response.getErrorMessage()
-                            + " seq:"
-                            + response.getMessageID());
         }
     }
 }