diff --git a/VectoCore/VectoCore/Models/Simulation/Impl/VectoRun.cs b/VectoCore/VectoCore/Models/Simulation/Impl/VectoRun.cs
index 7f87c9a4a705ce6b54b7533fb9d7e4d2a5db6402..fa9c6caf15c9ca1ff0faa7e77c29f6d3a9f81670 100644
--- a/VectoCore/VectoCore/Models/Simulation/Impl/VectoRun.cs
+++ b/VectoCore/VectoCore/Models/Simulation/Impl/VectoRun.cs
@@ -195,7 +195,7 @@ namespace TUGraz.VectoCore.Models.Simulation.Impl
 				},
 				this,
 				() => {
-					Container.RunData.Report.PrepareResult(null); //<- increase number of expected results;
+					Container.RunData.Report?.PrepareResult(null); //<- increase number of expected results;
                     Container.FinishSingleSimulationRun();
 				}) ?? false;
 			if (!runAgain) {