diff --git a/Assets/uDesktopDuplication/Examples/Scenes/Zoom.unity b/Assets/uDesktopDuplication/Examples/Scenes/Zoom.unity
index 2a36f3f..c92038c 100644
Binary files a/Assets/uDesktopDuplication/Examples/Scenes/Zoom.unity and b/Assets/uDesktopDuplication/Examples/Scenes/Zoom.unity differ
diff --git a/Assets/uDesktopDuplication/Examples/Scripts/Loupe.cs b/Assets/uDesktopDuplication/Examples/Scripts/Loupe.cs
index d9337c2..0c1cca7 100644
--- a/Assets/uDesktopDuplication/Examples/Scripts/Loupe.cs
+++ b/Assets/uDesktopDuplication/Examples/Scripts/Loupe.cs
@@ -14,6 +14,9 @@ public class Loupe : MonoBehaviour
 
     void Update()
     {
+        CheckVariables();
+
+        if (uDesktopDuplication.Manager.cursorMonitorId < 0) return;
         uddTexture_.monitorId = uDesktopDuplication.Manager.cursorMonitorId;
 
         // To get other monitor textures, set dirty flag.
@@ -31,5 +34,11 @@ public class Loupe : MonoBehaviour
         uddTexture_.clipPos = new Vector2(x, y);
         uddTexture_.clipScale = new Vector2(w, h);
     }
+
+    void CheckVariables()
+    {
+        if (zoom < 1f) zoom = 1f;
+        if (aspect < 0.01f) aspect = 0.01f;
+    }
 }
 
diff --git a/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll b/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll
index 4075b35..caaf1de 100644
Binary files a/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll and b/Assets/uDesktopDuplication/Plugins/x86_64/uDesktopDuplication.dll differ
diff --git a/Assets/uDesktopDuplication/Scripts/Manager.cs b/Assets/uDesktopDuplication/Scripts/Manager.cs
index 87c348a..3b42ded 100644
--- a/Assets/uDesktopDuplication/Scripts/Manager.cs
+++ b/Assets/uDesktopDuplication/Scripts/Manager.cs
@@ -118,7 +118,9 @@ public class Manager : MonoBehaviour
         Debug.Log("[uDesktopDuplication] Reinitialize");
         Lib.Reinitialize();
         CreateMonitors();
-        onReinitialized();
+        if (onReinitialized != null) {
+            onReinitialized();
+        }
     }
 
     void ReinitializeIfNeeded()