diff --git a/desktop_env/evaluators/getters/gimp.py b/desktop_env/evaluators/getters/gimp.py
index b795d17..a188374 100644
--- a/desktop_env/evaluators/getters/gimp.py
+++ b/desktop_env/evaluators/getters/gimp.py
@@ -27,6 +27,11 @@ def get_gimp_config_file(env, config: Dict[str, str]):
 
     _path = os.path.join(env.cache_dir, config["dest"])
     content = env.controller.get_file(config_path)
+
+    if not content:
+        logger.error("Failed to get GIMP config file.")
+        return None
+
     with open(_path, "wb") as f:
         f.write(content)
 
diff --git a/desktop_env/evaluators/metrics/vscode.py b/desktop_env/evaluators/metrics/vscode.py
index 14e9df1..41710ae 100644
--- a/desktop_env/evaluators/metrics/vscode.py
+++ b/desktop_env/evaluators/metrics/vscode.py
@@ -49,6 +49,8 @@ def check_json_settings(actual: str, expected: str, **options) -> float:
     Return:
         float: the score
     """
+    if not actual:
+        return 0.
 
     with open(actual, 'r') as f:
         data = json.load(f)
diff --git a/evaluation_examples/examples/vs_code/0ed39f63-6049-43d4-ba4d-5fa2fe04a951.json b/evaluation_examples/examples/vs_code/0ed39f63-6049-43d4-ba4d-5fa2fe04a951.json
index c695041..8047035 100644
--- a/evaluation_examples/examples/vs_code/0ed39f63-6049-43d4-ba4d-5fa2fe04a951.json
+++ b/evaluation_examples/examples/vs_code/0ed39f63-6049-43d4-ba4d-5fa2fe04a951.json
@@ -18,7 +18,10 @@
     {
       "type": "launch",
       "parameters": {
-        "command": ["code", "/home/user/Desktop/vscode_replace_text.txt"]
+        "command": [
+          "code",
+          "/home/user/Desktop/vscode_replace_text.txt"
+        ]
       }
     },
     {
@@ -33,6 +36,36 @@
     "vscode"
   ],
   "evaluator": {
+    "postconfig": [
+      {
+        "type": "activate_window",
+        "parameters": {
+          "window_name": "Visual Studio Code"
+        }
+      },
+      {
+        "type": "sleep",
+        "parameters": {
+          "seconds": 0.5
+        }
+      },
+      {
+        "type": "execute",
+        "parameters": {
+          "command": [
+            "python",
+            "-c",
+            "import pyautogui; pyautogui.hotkey('ctrl', 's');"
+          ]
+        }
+      },
+      {
+        "type": "sleep",
+        "parameters": {
+          "seconds": 0.5
+        }
+      }
+    ],
     "func": "compare_text_file",
     "expected": {
       "type": "cloud_file",