diff --git a/tools/sim_video_cap.py b/tools/sim_video_cap.py
index fa2583315588f2a2bc45be35a8126959c9adaf36..4750e5d19256711af0480470e01129db4568c7a8 100644
--- a/tools/sim_video_cap.py
+++ b/tools/sim_video_cap.py
@@ -8,6 +8,7 @@ import win32gui
 import win32ui
 import win32con
 import win32api
+import traceback
 
 
 def get_window_handle(window_name="universe_sim"):
@@ -78,6 +79,7 @@ def sim_window_screen_shot(wait_ses=-1):
                 img = screen_shot(img_dc)
             except Exception as e:
                 print("ERROR:", str(e))
+                traceback.print_exc()
                 return None
             return img
         if wait_ses < 0: