diff --git a/NHSE.Injection/Injector/AutoInjector.cs b/NHSE.Injection/Injector/AutoInjector.cs
index 8b2583d..93573e8 100644
--- a/NHSE.Injection/Injector/AutoInjector.cs
+++ b/NHSE.Injection/Injector/AutoInjector.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics;
 
 namespace NHSE.Injection
 {
@@ -29,18 +30,35 @@ public InjectionResult Read(bool force = false)
         {
             if ((!AutoInjectEnabled && !force) || !Injector.Connected)
                 return InjectionResult.Skipped;
-            var result = Injector.Read();
-            AfterRead(result);
-            return result;
+
+            try
+            {
+                var result = Injector.Read();
+                AfterRead(result);
+                return result;
+            }
+            catch (IndexOutOfRangeException ex)
+            {
+                Debug.WriteLine(ex.Message);
+                return InjectionResult.FailConnectionError;
+            }
         }
 
         public InjectionResult Write(bool force = false)
         {
             if ((!AutoInjectEnabled && !force) || !Injector.Connected)
                 return InjectionResult.Skipped;
-            var result = Injector.Write();
-            AfterWrite(result);
-            return result;
+            try
+            {
+                var result = Injector.Write();
+                AfterWrite(result);
+                return result;
+            }
+            catch (IndexOutOfRangeException ex)
+            {
+                Debug.WriteLine(ex.Message);
+                return InjectionResult.FailConnectionError;
+            }
         }
 
         public void SetWriteOffset(in uint offset)
diff --git a/NHSE.Injection/Injector/InjectionResult.cs b/NHSE.Injection/Injector/InjectionResult.cs
index 1edc42f..8fa9eff 100644
--- a/NHSE.Injection/Injector/InjectionResult.cs
+++ b/NHSE.Injection/Injector/InjectionResult.cs
@@ -5,6 +5,7 @@ public enum InjectionResult
         Skipped,
         Success,
         FailValidate,
+        FailConnectionError,
         Same,
     }
-}
\ No newline at end of file
+}
diff --git a/NHSE.WinForms/Subforms/SysBot/SysBotUI.cs b/NHSE.WinForms/Subforms/SysBot/SysBotUI.cs
index 82602b5..add7f78 100644
--- a/NHSE.WinForms/Subforms/SysBot/SysBotUI.cs
+++ b/NHSE.WinForms/Subforms/SysBot/SysBotUI.cs
@@ -50,8 +50,9 @@ private void B_WriteCurrent_Click(object sender, EventArgs e)
             try
             {
                 var result = Injector.Write(true);
-                if (result != InjectionResult.Success)
-                    WinFormsUtil.Alert(result.ToString());
+                if (result == InjectionResult.Success)
+                    return;
+                WinFormsUtil.Alert(result.ToString());
             }
 #pragma warning disable CA1031 // Do not catch general exception types
             catch (Exception ex)
@@ -59,6 +60,7 @@ private void B_WriteCurrent_Click(object sender, EventArgs e)
             {
                 WinFormsUtil.Error(ex.Message);
             }
+            TurnOffAuto();
         }
 
         private void B_ReadCurrent_Click(object sender, EventArgs e)
@@ -66,8 +68,9 @@ private void B_ReadCurrent_Click(object sender, EventArgs e)
             try
             {
                 var result = Injector.Read(true);
-                if (result != InjectionResult.Success)
-                    WinFormsUtil.Alert(result.ToString());
+                if (result == InjectionResult.Success)
+                    return;
+                WinFormsUtil.Alert(result.ToString());
             }
 #pragma warning disable CA1031 // Do not catch general exception types
             catch (Exception ex)
@@ -75,6 +78,15 @@ private void B_ReadCurrent_Click(object sender, EventArgs e)
             {
                 WinFormsUtil.Error(ex.Message);
             }
+            TurnOffAuto();
+        }
+
+        private void TurnOffAuto()
+        {
+            if (CHK_AutoRead.Checked)
+                CHK_AutoRead.Checked = false;
+            if (CHK_AutoWrite.Checked)
+                CHK_AutoWrite.Checked = false;
         }
 
         private void CHK_AutoWrite_CheckedChanged(object sender, EventArgs e) => Injector.AutoInjectEnabled = CHK_AutoWrite.Checked;