Update app.py

app.py

@@ -68,7 +68,9 @@ def download_files_from_s3(bucket_name, local_folder, file_path_list):
                     st.markdown(f"Downloaded: {local_path}")
                 except Exception as e:
                     st.error(f"Error downloading {key}: {e}")
-    
+        for path in file_path_list:
+            if not os.path.isfile(os.path.join(local_folder, path)):
+                st.error(f"Failed to download file {path}")
     except NoCredentialsError:
         st.error("No AWS credentials found.")
     except Exception as e: