diff --git a/VectoCore/VectoCore/Models/SimulationComponent/Impl/ElectricMotor.cs b/VectoCore/VectoCore/Models/SimulationComponent/Impl/ElectricMotor.cs
index c9c30009eb506810106e3665c88041e2ecbb9a25..91ffad2f5135ba0e3462d5df684bebad8aa68a29 100644
--- a/VectoCore/VectoCore/Models/SimulationComponent/Impl/ElectricMotor.cs
+++ b/VectoCore/VectoCore/Models/SimulationComponent/Impl/ElectricMotor.cs
@@ -374,7 +374,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 			
 			if (!dryRun) {
 				CurrentState.IceSwitchedOn = iceOn;
-				CurrentState.ICEOnSpeed = DataBus.EngineInfo.EngineSpeed;
+				CurrentState.ICEOnSpeed = DataBus.EngineInfo?.EngineSpeed;
 				CurrentState.EMSpeed = emSpeed;
 				CurrentState.EMTorque = emOff ? null : emTorque;
 				CurrentState.EmTorqueMap = emTorqueMap;
diff --git a/VectoCore/VectoCore/OutputData/ModalDataContainer.cs b/VectoCore/VectoCore/OutputData/ModalDataContainer.cs
index a5622e6202cdc5ecc629a7b5f2c2b68d61033dea..644197b8c6d7ba1d4260eab778f9d8c4564f8bf8 100644
--- a/VectoCore/VectoCore/OutputData/ModalDataContainer.cs
+++ b/VectoCore/VectoCore/OutputData/ModalDataContainer.cs
@@ -277,7 +277,7 @@ namespace TUGraz.VectoCore.OutputData
 						E_EM = r.Field<Watt>(string.Format(ModalResultField.P_EM_mech_.GetCaption(), emPos.GetName())) *
 								dt
 					};
-				}).Where(x => x.EM_off.IsEqual(0) && x.E_EM.IsSmaller(0)).Sum(x => x.E_EM);
+				}).Where(x => x.EM_off.IsEqual(0) && x.E_EM.IsSmaller(0)).Sum(x => x.E_EM) ?? 0.SI<WattSecond>();
 				return -_eEmDrive.GetOrAdd(emPos, _ => eEmDrive);
 			}
 		}
@@ -300,7 +300,7 @@ namespace TUGraz.VectoCore.OutputData
 						E_EM = r.Field<Watt>(string.Format(ModalResultField.P_EM_mech_.GetCaption(), emPos.GetName())) *
 								dt
 					};
-				}).Where(x => x.EM_off.IsEqual(0) && x.E_EM.IsGreater(0)).Sum(x => x.E_EM);
+				}).Where(x => x.EM_off.IsEqual(0) && x.E_EM.IsGreater(0)).Sum(x => x.E_EM) ?? 0.SI<WattSecond>();
 				return _eEmRecuperate.GetOrAdd(emPos, _ => eEmRecup);
 			}
 		}
@@ -387,7 +387,7 @@ namespace TUGraz.VectoCore.OutputData
 			});
 			var eMech = 0.SI<WattSecond>();
 			var eEl = 0.SI<WattSecond>();
-			foreach (var entry in selected.Where(x => x.P_em.IsGreater(0) && !x.EM_off.IsEqual(0))) {
+			foreach (var entry in selected.Where(x => x.P_em.IsGreater(0) && x.EM_off.IsEqual(0))) {
 				eMech += entry.E_mech;
 				eEl += entry.E_el;
 			}
diff --git a/VectoCore/VectoCoreTest/Models/Simulation/AuxTests.cs b/VectoCore/VectoCoreTest/Models/Simulation/AuxTests.cs
index 190a47b6deb99a84a88d9cf41fe91d35b8cc69c7..4c7eec9bc69935a663a82177b6277ea3c39b6c96 100644
--- a/VectoCore/VectoCoreTest/Models/Simulation/AuxTests.cs
+++ b/VectoCore/VectoCoreTest/Models/Simulation/AuxTests.cs
@@ -108,6 +108,7 @@ namespace TUGraz.VectoCore.Tests.Models.Simulation
 			new ZeroMileageCounter(container);
 			new DummyDriverInfo(container);
 			var aux = new EngineAuxiliary(container);
+			new MockEngine(container);
 
 			var hdvClass = VehicleClass.Class5;
 			var mission = MissionType.LongHaul;
@@ -159,6 +160,7 @@ namespace TUGraz.VectoCore.Tests.Models.Simulation
 			var container = new VehicleContainer(ExecutionMode.Engineering, dataWriter);
 			//var port = new MockTnOutPort();
 			var aux = new EngineAuxiliary(container);
+			new MockEngine(container);
 
 			var constPower = 1200.SI<Watt>();
 			aux.AddConstant("CONSTANT", constPower);
@@ -194,6 +196,7 @@ namespace TUGraz.VectoCore.Tests.Models.Simulation
 			var cycle = new MockDrivingCycle(container, data);
 
 			var aux = new EngineAuxiliary(container);
+			new MockEngine(container);
 
 			aux.AddCycle("CYCLE");
 			container.ModalData.AddAuxiliary("CYCLE");
@@ -229,7 +232,7 @@ namespace TUGraz.VectoCore.Tests.Models.Simulation
 			var cycle = new MockDrivingCycle(container, data);
 
 			var aux = new EngineAuxiliary(container);
-
+			new MockEngine(container);
 
 			aux.AddCycle("CYCLE");
 			var constPower = 1200.SI<Watt>();
diff --git a/VectoCore/VectoCoreTest/Models/SimulationComponent/ClutchTest.cs b/VectoCore/VectoCoreTest/Models/SimulationComponent/ClutchTest.cs
index 3425be82fd5865c6476e814eda75b6c5742cfc0c..61ebd645060df5cc22713548d901acc0c11499aa 100644
--- a/VectoCore/VectoCoreTest/Models/SimulationComponent/ClutchTest.cs
+++ b/VectoCore/VectoCoreTest/Models/SimulationComponent/ClutchTest.cs
@@ -196,7 +196,7 @@ namespace TUGraz.VectoCore.Tests.Models.SimulationComponent
 		public PerSecond EngineN95hSpeed { get; set; }
 		public PerSecond EngineN80hSpeed { get; set; }
 
-		public bool EngineOn => throw new System.NotImplementedException();
+		public bool EngineOn { get; set; }
 
 		protected override void DoWriteModalResults(Second time, Second simulationInterval, IModalDataContainer container)
 		{
diff --git a/VectoCore/VectoCoreTest/VectoCoreTest.csproj b/VectoCore/VectoCoreTest/VectoCoreTest.csproj
index e9502c85ba4b5465fb10cd0202fb9e52b8fcdd0f..3faf7e0509d51e23b4518f239cdcfed63201f7b3 100644
--- a/VectoCore/VectoCoreTest/VectoCoreTest.csproj
+++ b/VectoCore/VectoCoreTest/VectoCoreTest.csproj
@@ -451,6 +451,15 @@
     <None Include="TestData\Components\AT_GBX\GearboxSerial8Spd.vgbx">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Include="TestData\Components\ElectricMotor\vem_P_inverter_DC_90_coarse.vemo">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="TestData\Components\ElectricMotor\vem_P_inverter_DC_90_fine.vemo">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="TestData\Components\ElectricMotor\vem_P_inverter_DC_std.vemo">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <None Include="TestData\Components\GearshiftLinesVoith.vgsv">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>