diff --git a/server/web3helper/controllers/bcservice.js b/server/web3helper/controllers/bcservice.js
index 5d0498a..3d3ea08 100644
--- a/server/web3helper/controllers/bcservice.js
+++ b/server/web3helper/controllers/bcservice.js
@@ -124,6 +124,10 @@ async function presentItem(session) {
       't_mint',
       fieldsList
     );
+    if (err) {
+      session.rspErr(500, 'server internal error');
+      return;
+    }
   }
 
   session.rspOk();