diff --git a/NethackHelper/MainForm.Designer.cs b/NethackHelper/MainForm.Designer.cs
index a2b23c6..e9560f6 100644
--- a/NethackHelper/MainForm.Designer.cs
+++ b/NethackHelper/MainForm.Designer.cs
@@ -102,6 +102,7 @@ namespace NethackHelper {
             this.fileToolStripMenuItem = new ToolStripMenuItem();
             this.resetToolStripMenuItem = new ToolStripMenuItem();
             this.toolTip1 = new ToolTip(this.components);
+            this.copyOverlayURLToolStripMenuItem = new ToolStripMenuItem();
             extrinsicLabel = new Label();
             intrinsicLabel = new Label();
             label3 = new Label();
@@ -1082,7 +1083,7 @@ namespace NethackHelper {
             // 
             // fileToolStripMenuItem
             // 
-            this.fileToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { this.resetToolStripMenuItem });
+            this.fileToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { this.resetToolStripMenuItem, this.copyOverlayURLToolStripMenuItem });
             this.fileToolStripMenuItem.Name = "fileToolStripMenuItem";
             this.fileToolStripMenuItem.Size = new Size(37, 20);
             this.fileToolStripMenuItem.Text = "File";
@@ -1090,9 +1091,16 @@ namespace NethackHelper {
             // resetToolStripMenuItem
             // 
             this.resetToolStripMenuItem.Name = "resetToolStripMenuItem";
-            this.resetToolStripMenuItem.Size = new Size(102, 22);
+            this.resetToolStripMenuItem.Size = new Size(180, 22);
             this.resetToolStripMenuItem.Text = "Reset";
             // 
+            // copyOverlayURLToolStripMenuItem
+            // 
+            this.copyOverlayURLToolStripMenuItem.Name = "copyOverlayURLToolStripMenuItem";
+            this.copyOverlayURLToolStripMenuItem.Size = new Size(180, 22);
+            this.copyOverlayURLToolStripMenuItem.Text = "Copy Overlay URL";
+            this.copyOverlayURLToolStripMenuItem.Click += this.copyOverlayURLToolStripMenuItem_Click;
+            // 
             // MainForm
             // 
             this.AutoScaleDimensions = new SizeF(7F, 15F);
@@ -1205,5 +1213,6 @@ namespace NethackHelper {
         private PropertyBox waterWalkingBox;
         private PropertyBox lifeSavingBox;
         private PropertyBox flyingBox;
+        private ToolStripMenuItem copyOverlayURLToolStripMenuItem;
     }
 }
\ No newline at end of file
diff --git a/NethackHelper/MainForm.cs b/NethackHelper/MainForm.cs
index f602edb..5813dbf 100644
--- a/NethackHelper/MainForm.cs
+++ b/NethackHelper/MainForm.cs
@@ -7,6 +7,7 @@ namespace NethackHelper {
     using System.IO;
     using System.Threading.Tasks;
     using System.Windows.Forms;
+    using YamlDotNet.Core;
 
     public partial class MainForm : Form {
         private const int PORT = 5993;
@@ -37,9 +38,19 @@ namespace NethackHelper {
             this.charismaSelector.ValueMember = "Modifier";
 
             foreach (var filename in Directory.EnumerateFiles("sokoban", "*.yaml")) {
-                var sokoban = new SokobanSolution(YamlOptions.DeserializeFile<SokobanFile>(filename));
-                this.sokobans.Add(sokoban);
-                this.sokobanLevelList.Items.Add(sokoban.Name);
+                try {
+                    var sokoban = new SokobanSolution(YamlOptions.DeserializeFile<SokobanFile>(filename));
+                    this.sokobans.Add(sokoban);
+                    this.sokobanLevelList.Items.Add(sokoban.Name);
+                } catch (YamlException err) {
+                    Console.Error.WriteLine("Error loading sokoban file {0}", filename);
+                    Console.Error.WriteLine(err.Message);
+                    Console.Error.WriteLine(err.StackTrace);
+                } catch (SokobanError err) {
+                    Console.Error.WriteLine("Error loading sokoban file {0}", filename);
+                    Console.Error.WriteLine(err.Message);
+                    Console.Error.WriteLine(err.StackTrace);
+                }
             }
 
             var versions = YamlOptions.DeserializeFile<List<Version>>("items/versions.yaml");
@@ -261,5 +272,9 @@ namespace NethackHelper {
         private void godAngryCheckbox_CheckedChanged(object sender, EventArgs e) {
             TrackerManager.Instance.Tracker.UpdateAngry(godAngryCheckbox.Checked);
         }
+
+        private void copyOverlayURLToolStripMenuItem_Click(object sender, EventArgs e) {
+            Clipboard.SetText($"http://localhost:{PORT}/tracker.html");
+        }
     }
 }
\ No newline at end of file