diff --git a/mlair/run_modules/pre_processing.py b/mlair/run_modules/pre_processing.py
index 7f3ce51e442eb101d1e0231d42a9be5741c7a958..4d90f87b501b040bf5dd044e6b038aed9e626ffc 100644
--- a/mlair/run_modules/pre_processing.py
+++ b/mlair/run_modules/pre_processing.py
@@ -5,11 +5,11 @@ __date__ = '2019-11-25'
 
 import logging
 import os
+import traceback
 from typing import Tuple
 import multiprocessing
 import requests
 import psutil
-import traceback
 
 import numpy as np
 import pandas as pd
@@ -338,6 +338,14 @@ def f_proc(data_handler, station, name_affix, store, **kwargs):
         res = data_handler.build(station, name_affix=name_affix, store_processed_data=store, **kwargs)
     except (AttributeError, EmptyQueryResult, KeyError, requests.ConnectionError, ValueError) as e:
         formatted_lines = traceback.format_exc().splitlines()
-        logging.info(f"remove station {station} because it raised an error: {e} (from {' | '.join(formatted_lines[-3:])}")
+        logging.info(
+            f"remove station {station} because it raised an error: {e} -> {' | '.join(f_inspect_error(formatted_lines))}")
         res = None
     return res, station
+
+
+def f_inspect_error(formatted):
+    for i in range(len(formatted) - 1, -1, -1):
+        if "mlair/mlair" not in formatted[i]:
+            return formatted[i - 3:i]
+    return formatted[-3:0]