diff --git a/Dynamic/PlantSimulator/PlantSimulator.cs b/Dynamic/PlantSimulator/PlantSimulator.cs
index 43f3bb4..2bea48c 100644
--- a/Dynamic/PlantSimulator/PlantSimulator.cs
+++ b/Dynamic/PlantSimulator/PlantSimulator.cs
@@ -740,7 +740,9 @@ public bool Simulate(TimeSeriesDataSet inputData, out TimeSeriesDataSet simData)
             // initalize the new time-series to be created in simData.
             var init = new PlantSimulatorInitalizer(this);
 
-            var didInit = init.ToSteadyStateAndEstimateDisturbances(ref inputData, ref simData, compLoopDict);
+            var inputDataMinimal = new TimeSeriesDataSet(inputData);
+
+            var didInit = init.ToSteadyStateAndEstimateDisturbances(ref inputDataMinimal, ref simData, compLoopDict);
             if (!didInit)
             {
                 Shared.GetParserObj().AddError("PlantSimulator failed to initalize.");
@@ -759,7 +761,7 @@ public bool Simulate(TimeSeriesDataSet inputData, out TimeSeriesDataSet simData)
                         "\" has null inputIDs.");
                     return false;
                 }
-                double[] inputVals = GetValuesFromEitherDataset(inputIDs, timeIdx, simData, inputData);
+                double[] inputVals = GetValuesFromEitherDataset(inputIDs, timeIdx, simData, inputDataMinimal);
 
                 string outputID = model.GetOutputID();
                 if (outputID == null)
@@ -769,17 +771,17 @@ public bool Simulate(TimeSeriesDataSet inputData, out TimeSeriesDataSet simData)
                     return false;
                 }
                 double[] outputVals =
-                    GetValuesFromEitherDataset(new string[] { outputID }, timeIdx, simData, inputData);
+                    GetValuesFromEitherDataset(new string[] { outputID }, timeIdx, simData, inputDataMinimal);
                 if (outputVals != null)
                 {
                     model.WarmStart(inputVals, outputVals[0]);
                 }
             }
 
-            var idxToIgnore = inputData.GetIndicesToIgnore();
+            var idxToIgnore = inputDataMinimal.GetIndicesToIgnore();
             int lastGoodTimeIndex = 0;
             // if start of dataset is bad, then parse forward until first good time index..
-            while (idxToIgnore.Contains(lastGoodTimeIndex) && lastGoodTimeIndex < inputData.GetLength())
+            while (idxToIgnore.Contains(lastGoodTimeIndex) && lastGoodTimeIndex < inputDataMinimal.GetLength())
             {
                 lastGoodTimeIndex++;
             }
@@ -799,7 +801,7 @@ public bool Simulate(TimeSeriesDataSet inputData, out TimeSeriesDataSet simData)
                     {
                         inputDataLookBackIdx = 1;//if set to zero, model fails(requires changing model order).
                     }
-                    double[] inputVals = GetValuesFromEitherDataset(inputIDs, lastGoodTimeIndex - inputDataLookBackIdx, simData, inputData);
+                    double[] inputVals = GetValuesFromEitherDataset(inputIDs, lastGoodTimeIndex - inputDataLookBackIdx, simData, inputDataMinimal);
                     if (inputVals == null)
                     {
                         Shared.GetParserObj().AddError("PlantSimulator.Simulate() failed. Model \"" + model.GetID() +
@@ -826,8 +828,8 @@ public bool Simulate(TimeSeriesDataSet inputData, out TimeSeriesDataSet simData)
                     }
                 }
             }
-            simData.SetTimeStamps(inputData.GetTimeStamps().ToList());
-            PlantFitScore = FitScoreCalculator.GetPlantWideSimulated(this, inputData, simData);
+            simData.SetTimeStamps(inputDataMinimal.GetTimeStamps().ToList());
+             PlantFitScore = FitScoreCalculator.GetPlantWideSimulated(this, inputData, simData);
             return true;
         }
 
diff --git a/TimeSeriesAnalysis.Tests/Tests/DisturbanceEstimatorTests.cs b/TimeSeriesAnalysis.Tests/Tests/DisturbanceEstimatorTests.cs
index 553cbce..561897e 100644
--- a/TimeSeriesAnalysis.Tests/Tests/DisturbanceEstimatorTests.cs
+++ b/TimeSeriesAnalysis.Tests/Tests/DisturbanceEstimatorTests.cs
@@ -112,11 +112,11 @@ public void PlantSimulator_StepDisturbance_EstimatesOk(double stepAmplitude)
         [TestCase(4,-1)]
         public void PlantSimulator_StepDisturbanceANDSetPointStep_EstimatesOk(double disturbanceStepAmplitude,double setpointAmplitude)
         {
-         //   Shared.EnablePlots();
+           // Shared.EnablePlots();
             var trueDisturbance = TimeSeriesCreator.Step(100, N, 0, disturbanceStepAmplitude);
             var setpoint = TimeSeriesCreator.Step(50, N, 50, 50+setpointAmplitude);
             DisturbanceTestUsingPlantSimulator(new UnitModel(dynamicModelParameters, "PlantSim_d"), trueDisturbance, true, setpoint);
-       //     Shared.DisablePlots();
+            //Shared.DisablePlots();
         }
 
 
diff --git a/TimeSeriesAnalysis.csproj b/TimeSeriesAnalysis.csproj
index 3270909..5dbff76 100644
--- a/TimeSeriesAnalysis.csproj
+++ b/TimeSeriesAnalysis.csproj
@@ -14,7 +14,7 @@
 	<RunAnalyzersDuringLiveAnalysis>False</RunAnalyzersDuringLiveAnalysis>
     	<RepositoryUrl>https://github.com/equinor/TimeSeriesAnalysis.git</RepositoryUrl>
     	<PackageReadmeFile>readme.md</PackageReadmeFile>
-    	<Version>1.3.37</Version>
+    	<Version>1.3.38</Version>
     	<Company>Equinor</Company>
     	<Authors>Equinor</Authors>
     	<IncludeSymbols>true</IncludeSymbols>