diff --git a/mycobot_ai/ai_mecharm_270/scripts/add_img.py b/mycobot_ai/ai_mecharm_270/scripts/add_img.py
index 38012e5..0b9423e 100755
--- a/mycobot_ai/ai_mecharm_270/scripts/add_img.py
+++ b/mycobot_ai/ai_mecharm_270/scripts/add_img.py
@@ -56,6 +56,8 @@ def cut_photo():
         path = path1
     elif os.path.exists(path2):
         path = path2
+    else:
+        print("invalid path!")
 
     path_red = path+'/res/red'
     for i, j, k in os.walk(path_red):
diff --git a/mycobot_ai/ai_mycobot_280/scripts/add_img.py b/mycobot_ai/ai_mycobot_280/scripts/add_img.py
index 389a7a6..b8bdb99 100755
--- a/mycobot_ai/ai_mycobot_280/scripts/add_img.py
+++ b/mycobot_ai/ai_mycobot_280/scripts/add_img.py
@@ -56,7 +56,9 @@ def cut_photo():
         path = path1
     elif os.path.exists(path2):
         path = path2
-
+    else:
+        print("invalid path!")
+        
     path_red = path + '/res/red'
     for i, j, k in os.walk(path_red):
         file_len_red = len(k)
diff --git a/mycobot_ai/ai_mypalletizer_260/scripts/add_img.py b/mycobot_ai/ai_mypalletizer_260/scripts/add_img.py
index b8a8679..a13dc03 100755
--- a/mycobot_ai/ai_mypalletizer_260/scripts/add_img.py
+++ b/mycobot_ai/ai_mypalletizer_260/scripts/add_img.py
@@ -56,6 +56,8 @@ def cut_photo():
         path = path1
     elif os.path.exists(path2):
         path = path2
+    else:
+        print("invalid path!")
 
     path_red = path + '/res/red'
     for i, j, k in os.walk(path_red):