diff --git a/mz_train_tools_utils.py b/mz_train_tools_utils.py
index da336c8..b52a7b6 100644
--- a/mz_train_tools_utils.py
+++ b/mz_train_tools_utils.py
@@ -758,6 +758,7 @@ class Utils:
                         step, total_steps, pil_img_info)
                 except Exception as e:
                     print("progress_bar:", e)
+                    raise e
 
         return pb(steps)