Index: simulator/plugins/pretreatmentstates/loader.py
===================================================================
diff -u -rae63fbc76b4638ffdcdaad7b69648beeee3340c3 -r967521dff94783ce48b50abc8db6bcd67bb501bf
--- simulator/plugins/pretreatmentstates/loader.py	(.../loader.py)	(revision ae63fbc76b4638ffdcdaad7b69648beeee3340c3)
+++ simulator/plugins/pretreatmentstates/loader.py	(.../loader.py)	(revision 967521dff94783ce48b50abc8db6bcd67bb501bf)
@@ -9,7 +9,7 @@
 # parent
 from simulator.dynamicloader import DynamicLoader
 # hd Simulator
-from dialin.ui.hd_simulator import HDSimulator
+from simulator.interface import SimulationInterface
 # plugin specific
 from dialin.common.hd_defs import *
 
@@ -31,8 +31,8 @@
     tblRecirculateStates: QtWidgets.QTableWidget
     tblPatientConnectionStates: QtWidgets.QTableWidget
 
-    def __init__(self, hd_simulator: HDSimulator):
-        super().__init__(os.path.dirname(__file__), hd_simulator)
+    def __init__(self, interface: SimulationInterface):
+        super().__init__(os.path.dirname(__file__), interface)
 
     def _init_loader(self):
         """
@@ -113,7 +113,7 @@
         prime = int(self.tblPrimeStates.verticalHeaderItem(self.tblPrimeStates.currentRow()).text())
         recirculate = int(self.tblRecirculateStates.verticalHeaderItem(self.tblRecirculateStates.currentRow()).text())
         patient_connection = int(self.tblPatientConnectionStates.verticalHeaderItem(self.tblPatientConnectionStates.currentRow()).text())
-        self.hd_simulator.cmd_send_pre_treatment_state_data(
+        self.interface.hd.cmd_send_pre_treatment_state_data(
             sub_mode,
             water_sample,
             consumables_self_test,