diff --git a/ExtLibs/Controls/CustomMessageBox.cs b/ExtLibs/Controls/CustomMessageBox.cs
index fa27d80348..d8649c252d 100644
--- a/ExtLibs/Controls/CustomMessageBox.cs
+++ b/ExtLibs/Controls/CustomMessageBox.cs
@@ -5,6 +5,7 @@
 using System.Text.RegularExpressions;
 using MissionPlanner.Controls;
 using System.Threading;
+using TextBox = System.Windows.Forms.TextBox;
 
 namespace MissionPlanner.MsgBox
 {
@@ -69,7 +70,7 @@ public static DialogResult Show(string text, string caption, MessageBoxButtons b
             return answer;
         }
 
-        static DialogResult ShowUI(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, string YesText = "Yes", string NoText = "No")
+        static DialogResult ShowUI(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, string YesText = "Yes", string NoText = "No", bool label = true)
         {
             DialogResult answer = DialogResult.Abort;
 
@@ -123,15 +124,35 @@ static DialogResult ShowUI(string text, string caption, MessageBoxButtons button
                 Rectangle screenRectangle = msgBoxFrm.RectangleToScreen(msgBoxFrm.ClientRectangle);
                 int titleHeight = screenRectangle.Top - msgBoxFrm.Top;
 
-                var lblMessage = new Label
+                Control lblMessage = null;
+
+                if (label)
                 {
-                    Left = 58,
-                    Top = 15,
-                    Width = textSize.Width + 10,
-                    Height = textSize.Height + 10,
-                    Text = text,
-                    AutoSize = true
-                };
+                    lblMessage = new Label()
+                    {
+                        Left = 58,
+                        Top = 15,
+                        Width = textSize.Width + 10,
+                        Height = textSize.Height + 10,
+                        Text = text,
+                        AutoSize = true
+                    };
+                }
+                else
+                {
+                    lblMessage = new TextBox()
+                    {
+                        ReadOnly = true,
+                        Multiline = true,
+                        Left = 58,
+                        Top = 15,
+                        Width = textSize.Width + 10,
+                        Height = Math.Min( textSize.Height + 10, 500),
+                        Text = text,
+                        AutoSize = true,
+                        ScrollBars = ScrollBars.Vertical
+                    };
+                }
 
                 msgBoxFrm.Controls.Add(lblMessage);
 
@@ -353,5 +374,39 @@ private static Icon getMessageBoxIcon(MessageBoxIcon icon)
             }
         }
 
+        public static DialogResult ShowTextBox(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, string YesText = "Yes", string NoText = "No")
+        {
+            DialogResult answer = DialogResult.Cancel;
+
+            Console.WriteLine("CustomMessageBox ShowTextBox thread calling " + System.Threading.Thread.CurrentThread.Name);
+
+            // ensure we run this on the right thread - mono - mac
+            if (Application.OpenForms.Count > 0 && Application.OpenForms[0].InvokeRequired)
+            {
+                try
+                {
+                    Application.OpenForms[0].Invoke((Action)delegate
+                    {
+                        Console.WriteLine("CustomMessageBox ShowTextBox thread running invoke " +
+                                          System.Threading.Thread.CurrentThread.Name);
+                        answer = ShowUI(text, caption, buttons, icon, YesText, NoText, false);
+                    });
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine(ex);
+                    // fall back
+                    Console.WriteLine("CustomMessageBox ShowTextBox thread running " + System.Threading.Thread.CurrentThread.Name);
+                    answer = ShowUI(text, caption, buttons, icon, YesText, NoText, false);
+                }
+            }
+            else
+            {
+                Console.WriteLine("CustomMessageBox ShowTextBox thread running " + System.Threading.Thread.CurrentThread.Name);
+                answer = ShowUI(text, caption, buttons, icon, YesText, NoText, false);
+            }
+
+            return answer;
+        }
     }
 }
\ No newline at end of file
diff --git a/ExtLibs/Controls/ProgressReporterDialogue.cs b/ExtLibs/Controls/ProgressReporterDialogue.cs
index 7fed44ad82..3c5ded6a60 100644
--- a/ExtLibs/Controls/ProgressReporterDialogue.cs
+++ b/ExtLibs/Controls/ProgressReporterDialogue.cs
@@ -301,7 +301,8 @@ private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs
                           + Environment.NewLine + Environment.NewLine
                           + this.workerException.StackTrace;
 
-            MsgBox.CustomMessageBox.Show(message,"Exception Details",MessageBoxButtons.OK,MessageBoxIcon.Information);
+            MsgBox.CustomMessageBox.ShowTextBox(message, "Exception Details", MessageBoxButtons.OK,
+                MessageBoxIcon.Information);
         }
 
         /// <summary>