diff --git a/VECTO/GUI/BusAuxiliariesEngParametersForm.vb b/VECTO/GUI/BusAuxiliariesEngParametersForm.vb
index 3f940a3a26eb6cab9fced786297cdbad6933a102..c6cc99d90a031a6ddb275c60221f1ff960044edc 100644
--- a/VECTO/GUI/BusAuxiliariesEngParametersForm.vb
+++ b/VECTO/GUI/BusAuxiliariesEngParametersForm.vb
@@ -199,7 +199,7 @@ Public Class BusAuxiliariesEngParametersForm
         tbCurrentDemandEngineOffDriving.Text = inputData.ElectricSystem.CurrentDemandEngineOffDriving.ToGUIFormat()
         tbCurrentDemandEngineOffStandstill.Text = inputData.ElectricSystem.CurrentDemandEngineOffStandstill.ToGUIFormat()
         tbDCDCEff.Text = inputData.ElectricSystem.DCDCConverterEfficiency.ToGUIFormat()
-        if (JobType <> VectoSimulationJobType.BatteryElectricVehicle) Then
+        if (JobType <> VectoSimulationJobType.BatteryElectricVehicle AndAlso JobType <> VectoSimulationJobType.IEPC_E) Then
             tbAlternatorEfficiency.Text = inputData.ElectricSystem.AlternatorEfficiency.ToGUIFormat()
             cbAlternatorTechnology.SelectedValue  = inputData.ElectricSystem.AlternatorType
             tbMaxAlternatorPower.Text = inputData.ElectricSystem.MaxAlternatorPower.ToGUIFormat()
diff --git a/VECTO/Input Files/BusParamsEngineering.vb b/VECTO/Input Files/BusParamsEngineering.vb
index 0bebd1d4f986517744e9001b0c6ac7ffc02c7b4c..45884dff8b73f51f2555dadf93cebbe8c33ebdb0 100644
--- a/VECTO/Input Files/BusParamsEngineering.vb	
+++ b/VECTO/Input Files/BusParamsEngineering.vb	
@@ -131,7 +131,7 @@ Public Class BusAuxEngineeringParams
 
     Public ReadOnly Property PS_CompressorMap As TableData Implements IBusAuxPneumaticSystemEngineeringData.CompressorMap
     get
-        if JobType =VectoSimulationJobType.BatteryElectricVehicle then
+        if JobType =VectoSimulationJobType.BatteryElectricVehicle OrElse JobType = VectoSimulationJobType.IEPC_E then
                 return Nothing
         End If
         if Not file.Exists(CompressorMap.FullPath) Then