diff --git a/common/Multiprogramming.php b/common/Multiprogramming.php
index 056c0aa..9bae597 100644
--- a/common/Multiprogramming.php
+++ b/common/Multiprogramming.php
@@ -151,10 +151,10 @@ abstract class Multiprogramming implements Progaram
             return new Result(code: 505, message: $client->getBody());
         }
         $body = json_decode($client->getBody(), true);
-        if (!is_null($body)) {
+        if (is_null($body) || (isset($body['errcode']) && $body['errcode'] != 0)) {
             return new Result(code: $body['errcode'], message: $body['errmsg']);
         } else {
-            return new Result(code: 0, data: $client->getBody());
+            return new Result(code: 0, data: $body);
         }
     }