diff --git a/desktop_env/evaluators/metrics/vscode.py b/desktop_env/evaluators/metrics/vscode.py
index 61976f1..d207aae 100644
--- a/desktop_env/evaluators/metrics/vscode.py
+++ b/desktop_env/evaluators/metrics/vscode.py
@@ -236,6 +236,9 @@ def check_html_background_image(src_path: str, rule: Dict = None) -> float:
     Check if the background image is correctly set.
     multi-app:bb7db4c2-30b5-4be7-8dd7-b8c4ec7d3108
     """
+    if not src_path:
+        return 0.0
+
     from bs4 import BeautifulSoup
     with open(src_path, 'r') as f:
         html_content = f.read()
@@ -252,6 +255,9 @@ def compare_result_files(src_path, tgt_path):
     Compare whether the content of two files are the same.
     multi-app:7f35355e-02a6-45b5-b140-f0be698bcf85
     """
+    if not src_path or not tgt_path:
+        return 0.0
+
     with open(src_path, 'r') as f:
         src_content = f.read().strip()
     with open(tgt_path, 'r') as f:
diff --git a/desktop_env/server/main.py b/desktop_env/server/main.py
index efa62c7..d53232e 100644
--- a/desktop_env/server/main.py
+++ b/desktop_env/server/main.py
@@ -63,7 +63,7 @@ def execute_command():
 
     # Execute the command without any safety checks.
     try:
-        result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=shell, text=True)
+        result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=shell, text=True, timeout=120)
         return jsonify({
             'status': 'success',
             'output': result.stdout,
diff --git a/evaluation_examples/examples/libreoffice_impress/ac9bb6cb-1888-43ab-81e4-a98a547918cd.json b/evaluation_examples/examples/libreoffice_impress/ac9bb6cb-1888-43ab-81e4-a98a547918cd.json
index c0d6ba0..053421c 100644
--- a/evaluation_examples/examples/libreoffice_impress/ac9bb6cb-1888-43ab-81e4-a98a547918cd.json
+++ b/evaluation_examples/examples/libreoffice_impress/ac9bb6cb-1888-43ab-81e4-a98a547918cd.json
@@ -63,6 +63,12 @@
       "type": "vm_file",
       "path": "/home/user/Desktop/saa-format-guide.pptx",
       "dest": "saa-format-guide.pptx"
+    },
+    "expected": {
+      "type": "rule",
+      "rules": {
+        "color": "red"
+      }
     }
   }
 }
diff --git a/evaluation_examples/examples/multi_apps/4c26e3f3-3a14-4d86-b44a-d3cedebbb487.json b/evaluation_examples/examples/multi_apps/4c26e3f3-3a14-4d86-b44a-d3cedebbb487.json
index 0a70b11..447a862 100644
--- a/evaluation_examples/examples/multi_apps/4c26e3f3-3a14-4d86-b44a-d3cedebbb487.json
+++ b/evaluation_examples/examples/multi_apps/4c26e3f3-3a14-4d86-b44a-d3cedebbb487.json
@@ -30,12 +30,12 @@
     ],
     "evaluator": {
         "func": "check_brightness_decrease_and_structure_sim",
-        "expected": {
+        "result": {
             "type": "vm_file",
             "path": "/home/user/Desktop/background.png",
             "dest": "background.png"
         },
-        "result": {
+        "expected": {
             "type": "cloud_file",
             "path": "https://drive.usercontent.google.com/download?id=13if1UwZ5ay6ADAVW2jp3rcyvAEBse6MJ&export=download&authuser=0&confirm=t&uuid=2ea03068-1874-4240-baa1-f8bb2f917a99&at=APZUnTXq6dVlASg819jCaI1A-rm2:1710136385956",
             "dest": "image_original.png"
diff --git a/evaluation_examples/examples/multi_apps/demo.py b/evaluation_examples/examples/multi_apps/demo.py
deleted file mode 100644
index ffa2b85..0000000
--- a/evaluation_examples/examples/multi_apps/demo.py
+++ /dev/null
@@ -1,19 +0,0 @@
-import pandas as pd
-
-file_path = "/Users/lxc/Downloads/Speedtest.csv"
-# 找到csv第二行的第二个数据格里的值
-# with open(file_path, "r") as f:
-#     for i, line in enumerate(f):
-#         if i == 1:
-#             data = line.split(",")[1]
-#             break
-# print(data)
-
-with open(file_path, "r") as f:
-    reader = pd.read_csv(f, sep=',', header=None)
-    # for column in reader.columns:
-    #     if column.startswith("TEST_DATE"):
-    #         data_col = column
-    #         break
-    for data in reader['TEST_DATE']:
-        print(data)
\ No newline at end of file