diff --git a/common/rawaccel-version.h b/common/rawaccel-version.h
index 70029196..40ff2d2f 100644
--- a/common/rawaccel-version.h
+++ b/common/rawaccel-version.h
@@ -2,7 +2,7 @@
 
 #define RA_VER_MAJOR 1
 #define RA_VER_MINOR 4
-#define RA_VER_PATCH 2
+#define RA_VER_PATCH 3
 
 #define RA_OS "Win7+"
 
diff --git a/grapher/Form1.cs b/grapher/Form1.cs
index 6927211b..51f1355e 100644
--- a/grapher/Form1.cs
+++ b/grapher/Form1.cs
@@ -176,13 +176,16 @@ public RawAcceleration()
 
         protected override void WndProc(ref Message m)
         {
-            if (m.Msg == 0x00ff) // WM_INPUT
+            if (!(AccelGUI is null))
             {
-                AccelGUI.MouseWatcher.ReadMouseMove(m);
-            }
-            else if (m.Msg == 0x00fe) // WM_INPUT_DEVICE_CHANGE
-            {
-                AccelGUI.UpdateInputManagers();
+                if (m.Msg == 0x00ff) // WM_INPUT
+                {
+                    AccelGUI.MouseWatcher.ReadMouseMove(m);
+                }
+                else if (m.Msg == 0x00fe) // WM_INPUT_DEVICE_CHANGE
+                {
+                    AccelGUI.UpdateInputManagers();
+                }
             }
 
             base.WndProc(ref m);
diff --git a/grapher/Program.cs b/grapher/Program.cs
index 485e0747..894d1cd9 100644
--- a/grapher/Program.cs
+++ b/grapher/Program.cs
@@ -19,11 +19,20 @@ static void Main()
                 return;
             }
 
+            AppDomain.CurrentDomain.UnhandledException += GlobalUnhandledExceptionHandler;
+
             Application.EnableVisualStyles();
             Application.SetCompatibleTextRenderingDefault(false);
             Application.Run(new RawAcceleration());
-            
-            GC.KeepAlive(mutex);
+
+            GC.KeepAlive(mutex);      
+        }
+
+        static void GlobalUnhandledExceptionHandler(object sender, UnhandledExceptionEventArgs e)
+        {
+            var ex = (Exception)e.ExceptionObject;
+            System.IO.File.WriteAllText("error.log", ex.ToString());
+            MessageBox.Show(ex.Message, "Error");
         }
     }
 }