diff --git a/src/dashboard_model/service.py b/src/dashboard_model/service.py
index 9d7fc7c..8796642 100644
--- a/src/dashboard_model/service.py
+++ b/src/dashboard_model/service.py
@@ -20,12 +20,19 @@ async def get_model_data(*, db_session: DbSession, simulation_id: Optional[UUID]
     simulation = await get_simulation_by_id(
         db_session=db_session, simulation_id=simulation_id, is_completed=True
     )
-    main_node = await get_simulation_node_by(db_session=db_session, node_name="Boiler")
+    main_node = await get_simulation_node_by(db_session=db_session, node_name="- BTG_PC -")
+
+    if not simulation and not main_node:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Simulation not found"
+        )
+
 
     main_calc_data = await get_calc_result_by(
         db_session=db_session, simulation_id=simulation.id, aeros_node_id=main_node.id
     )
 
+
     # Total time period
     total_time = main_calc_data.total_uptime + main_calc_data.total_downtime