Upload app.py

app.py

@@ -283,7 +283,7 @@ with pd.ExcelWriter(output, engine='xlsxwriter') as writer:
     df_new_capacities.to_excel(writer, sheet_name='Capacities', index=False)
     df_production.to_excel(writer, sheet_name='Production', index=False)
     df_charging.to_excel(writer, sheet_name='Charging', index=False)
-    D_t.to_excel(writer, sheet_name='Demand', index=False)
+    D_t.to_dataframe().reset_index().to_excel(writer, sheet_name='Demand', index=False)
     df_curtailment.to_excel(writer, sheet_name='Curtailment', index=False)
     df_Co2_price.to_excel(writer, sheet_name='CO2_Price', index=False)