diff --git a/lib/proxy.js b/lib/proxy.js
index 7e3f51e..82eb1db 100644
--- a/lib/proxy.js
+++ b/lib/proxy.js
@@ -42,8 +42,8 @@ exports.exec = function(command, params) {
     // Stdout
     stdout.on('data', data => metadata.push(data));
     stdout.on('close', () => {
-      // Only parse when no error
-      if (!errors.length) {
+      // Only parse when with metadata
+      if (metadata.length) {
         // Decode data use utf16le
         let data = Buffer.concat(metadata).toString('utf16le');