diff --git a/pyerm/experiment.py b/pyerm/experiment.py
index fe96339..1c69952 100644
--- a/pyerm/experiment.py
+++ b/pyerm/experiment.py
@@ -20,7 +20,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-# Version: 0.2.0
+# Version: 0.2.3
 
 import os
 import typing
@@ -57,6 +57,7 @@ def experiment_start(self, description:str=None, start_time:float=None, tags:str
         assert self._method is not None, 'Method not initialized, run method_init() first'
         assert self._task is not None, 'Task not initialized, run task_init() first'
         self._id = self.experiment_table.experiment_start(description, self._method, self._method_id, self._data, self._data_id, self._task, start_time, tags, experimenters)
+        atexit.register(self.experiment_table.experiment_failed, self._id)
     
     def experiment_over(self, rst_dict:typing.Dict[str, typing.Union[int, float, str, bool, bytearray, bytes]], images:typing.List[typing.Union[Image.Image, str]]=[], end_time:float=None, useful_time_cost:float=None) -> None:
         assert self._id is not None, 'Experiment not started, run experiment_start() first'
@@ -67,11 +68,12 @@ def experiment_over(self, rst_dict:typing.Dict[str, typing.Union[int, float, str
         self.rst_table.record_rst(experiment_id=self._id, **rst_dict)
         self.rst_table.record_image(self._id, images)
         self.experiment_table.experiment_over(self._id, end_time=end_time, useful_time_cost=useful_time_cost)
+        atexit.unregister(self.experiment_table.experiment_failed)
 
-    def experiment_failed(self, exception:Exception, end_time:float=None) -> None:
+    def experiment_failed(self, end_time:float=None) -> None:
         assert self._id is not None, 'Experiment not started, run experiment_start() first'
-        self.experiment_table.experiment_failed(self._id, exception, end_time=end_time)
-        atexit.register(self.experiment_table.experiment_failed, self._id, exception, end_time=end_time)
+        self.experiment_table.experiment_failed(self._id, end_time=end_time)
+        
 
     def detail_update(self, detail_dict:typing.Dict[str, typing.Union[int, float, str, bool, bytearray, bytes]]):
         assert self._id is not None, 'Experiment not started, run experiment_start() first'
diff --git a/pyerm/tables.py b/pyerm/tables.py
index 128385a..8d3b2e0 100644
--- a/pyerm/tables.py
+++ b/pyerm/tables.py
@@ -20,7 +20,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-# Version: 0.2.2
+# Version: 0.2.3
 
 from PIL import Image
 from io import BytesIO
@@ -65,12 +65,12 @@ def experiment_over(self, experiment_id:int, end_time:float=None, useful_time_co
         end_time = strftime("%Y-%m-%d %H:%M:%S", end_time)
         super().update(f"id={experiment_id}", end_time=strftime(end_time), useful_time_cost=useful_time_cost, status='finished')
 
-    def experiment_failed(self, experiment_id:int, exception:Exception, end_time:float=None) -> None:
+    def experiment_failed(self, experiment_id:int, end_time:float=None) -> None:
         if end_time is None:
             end_time = time()
         end_time = localtime(end_time)
         end_time = strftime("%Y-%m-%d %H:%M:%S", end_time)
-        error_info = str(exception)
+        error_info = traceback.format_exc()
         super().update(f"id={experiment_id}", end_time=strftime(end_time), status='failed', failed_reason=error_info)
 
     def get_experiment(self, experiment_id:int) -> dict:
diff --git a/pyerm/webUI/home.py b/pyerm/webUI/home.py
index 5ed1b8c..61c2849 100644
--- a/pyerm/webUI/home.py
+++ b/pyerm/webUI/home.py
@@ -20,7 +20,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-# Version: 0.2.2
+# Version: 0.2.3
 
 import streamlit as st
 import os
@@ -34,7 +34,8 @@
 def home():
     title()
     load_db()
-    download_xls()
+    if os.path.exists(st.session_state.db_path) and st.session_state.db_path.endswith('.db'):
+        download_xls()
 
 def title():
     st.title('Python Experiment Record Manager WebUI')
diff --git a/setup.py b/setup.py
index 9b57540..3b1bab8 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-# Version: 0.2.2
+# Version: 0.2.3
 from setuptools import setup, find_packages
 
 with open("README.md", "r", encoding="utf-8") as f:
@@ -28,7 +28,7 @@
 
 setup(
     name='pyerm',
-    version='0.2.2',
+    version='0.2.3',
     author='Yuxuan Shao',
     author_email='yx_shao@qq.com',
     description='This project is an local experiment record manager for python based on SQLite DMS, suitable for recording experiment and analysing experiment data with a web UI, which can help you efficiently save your experiment settings and results for later analysis.',