diff --git a/lib/Abfrage_Sivas.py b/lib/Abfrage_Sivas.py
index 5ffeebe..dc298c1 100644
--- a/lib/Abfrage_Sivas.py
+++ b/lib/Abfrage_Sivas.py
@@ -118,6 +118,7 @@ class Kosten():
         config = configparser.ConfigParser()
         config["HW_Einzelpreise"] = latest_costs
         config["Preise durch Sivas nicht ermittelbar"] = not_found_in_sivas
+        print("writing new config file", name)
         with open(name, 'w') as configfile:
             config.write(configfile)
 
@@ -133,6 +134,7 @@ class Kosten():
             new_prices.append(latest_costs.get(sivas_number))
         data = {"Sivas-Nummern":sivas_numbers, "Alte Preise":old_prices, "Neue Preise":new_prices}
         df = pd.DataFrame.from_dict(data)
+        print("write price increments", name)
         df.to_excel(name, sheet_name="Preisänderungen", index_label="Sivas-Nummern")
 
 
@@ -143,15 +145,17 @@ if __name__ == '__main__':
     parser.add_argument('-o', '--outfile', action='store', help='name of the output excel file', default="Preis_Increments.xlsx")
 
     args = parser.parse_args()
-    zuordCfgFilePath = os.path.join(os.environ.get('ECALC_CFG'), "Zuordnung_Teilenummern.cfg")
-    sivasCfgFilePath = os.path.join(os.environ.get('ECALC_CFG'), "Sivas_Daten.cfg")
-    gridExportFilePath = os.path.join(os.environ.get('ECALC_CFG'), "grid_export.xlsx")
+    base = os.environ.get('ECALC_CFG')
+    zuordCfgFilePath = os.path.join(base, "Zuordnung_Teilenummern.cfg")
+    sivasCfgFilePath = os.path.join(base, "Sivas_Daten.cfg")
+    gridExportFilePath = os.path.join(base, "grid_export.xlsx")
 
-    if not os.path.isfile(zuordCfgFilePath):
+
+    if not os.path.exists(zuordCfgFilePath):
         print("no Zuordnung_Teilenummern.cfg in ECALC_CFG")
-    if not os.path.isfile(sivasCfgFilePath):
+    if not os.path.exists(sivasCfgFilePath):
         print("no Sivas_Daten.cfg in ECALC_CFG")
-    if not os.path.isfile(gridExportFilePath):
+    if not os.path.exists(gridExportFilePath):
         print("no grid_export.xlsx with prices from SIVAS in ECALC_CFG")
 
     # lies die alten config und die Excel-Liste mit den Sivas-Daten