diff --git a/SeeSharp/Experiments/Benchmark.cs b/SeeSharp/Experiments/Benchmark.cs
index 03d45bf..1e4eeba 100644
--- a/SeeSharp/Experiments/Benchmark.cs
+++ b/SeeSharp/Experiments/Benchmark.cs
@@ -72,7 +72,7 @@ float RunScene(SceneConfig sceneConfig, bool skipReference)
         if (reference.HasValue)
         {
             string refFilename = Path.Join(dir, "Reference.exr");
-            reference.Value.File.CopyTo(refFilename);
+            reference.Value.File.CopyTo(refFilename, true);
 
             try
             {
diff --git a/SeeSharp/SceneManagement/SceneLoader.cs b/SeeSharp/SceneManagement/SceneLoader.cs
index f750380..75d5d89 100644
--- a/SeeSharp/SceneManagement/SceneLoader.cs
+++ b/SeeSharp/SceneManagement/SceneLoader.cs
@@ -23,7 +23,7 @@ public Scene Scene
             // Reload if there are changes in the .blend file
             if (blendFile.Exists && ImportBlendFile())
             {
-                scene.Dispose();
+                scene?.Dispose();
                 scene = null;
             }