diff --git a/hub_api/workflow/insel_montly_energy_balance.py b/hub_api/workflow/insel_montly_energy_balance.py
index cdf0c9a..7bb24f0 100644
--- a/hub_api/workflow/insel_montly_energy_balance.py
+++ b/hub_api/workflow/insel_montly_energy_balance.py
@@ -43,7 +43,7 @@ class InselMonthlyEnergyBalance(Resource, Config):
                              year_of_construction_field=year_of_construction_field,
                              function_field=function_field,
                              function_to_hub=function_dictionary).city
-    except TypeError:
+    except KeyError:
       return None
 
   def _citygml(self, file_path):
@@ -58,7 +58,7 @@ class InselMonthlyEnergyBalance(Resource, Config):
                              function_field=function_field,
                              function_to_hub=function_dictionary,
                              hub_crs=hub_crs).city
-    except TypeError:
+    except KeyError:
       return None
 
   def post(self):
@@ -77,8 +77,8 @@ class InselMonthlyEnergyBalance(Resource, Config):
       tmp_path = (self._tmp_path / token).resolve()
       try:
         os.mkdir(tmp_path)
-      except:
-        print('already exist')
+      except FileExistsError:
+        pass
       geometry_file = request.files['geometry_file']
       if not self._allowed_extensions(geometry_file.filename):
         shutil.rmtree(tmp_path)
@@ -120,4 +120,4 @@ class InselMonthlyEnergyBalance(Resource, Config):
           'yearly_appliances_peak_load': building.appliances_peak_load[cte.YEAR]
         }
     shutil.rmtree(tmp_path)
-    return Response(json.dumps({'result': 'succeed', 'results': json.dumps(results)}), status=200, headers=response_token)
+    return Response(json.dumps({'result': 'succeed', 'results': results}), status=200, headers=response_token)