diff --git a/Z64Utils/Common/BitUtils.cs b/Z64Utils/Common/BitUtils.cs
index 149e34f..05b3c9e 100644
--- a/Z64Utils/Common/BitUtils.cs
+++ b/Z64Utils/Common/BitUtils.cs
@@ -22,7 +22,7 @@ public override string ToString()
                 if (Value.HasFlag(v))
                 {
                     var name = Enum.GetName(typeof(T), v);
-                    Debug.Assert(name != null);
+                    Utils.Assert(name != null);
                     if (count == 0)
                         ret = name;
                     else
@@ -33,7 +33,7 @@ public override string ToString()
             if (count == 0)
             {
                 var name = Enum.GetName(typeof(T), 0);
-                Debug.Assert(name != null);
+                Utils.Assert(name != null);
                 return name;
             }
 
diff --git a/Z64Utils/Common/Utils.cs b/Z64Utils/Common/Utils.cs
index 82d6798..a8169f6 100644
--- a/Z64Utils/Common/Utils.cs
+++ b/Z64Utils/Common/Utils.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
 using System.Runtime.InteropServices;
@@ -130,5 +131,18 @@ public static byte[] ZlibDecompress(byte[] input, int decSize)
                 return outStream.GetBuffer();
             }
         }
+
+        class AssertFailedException : Exception { }
+
+        // Avoid using Debug.Assert because that uses FailFast which kills the application
+        // without giving us a chance to log the exception.
+        [Conditional("DEBUG")]
+        public static void Assert([DoesNotReturnIf(false)] bool condition)
+        {
+            if (!condition)
+            {
+                throw new AssertFailedException();
+            }
+        }
     }
 }
diff --git a/Z64Utils/F3DZEX/Command/CmdInfo.cs b/Z64Utils/F3DZEX/Command/CmdInfo.cs
index 4c63fed..3501b4a 100644
--- a/Z64Utils/F3DZEX/Command/CmdInfo.cs
+++ b/Z64Utils/F3DZEX/Command/CmdInfo.cs
@@ -4,6 +4,7 @@
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Common;
 using RDP;
 
 namespace F3DZEX.Command
@@ -407,7 +408,7 @@ private static object ConvertCommand(Type t, CmdInfo cmd)
                 throw new InvalidF3DZEXOpCodeException("Invalid ID");
 
             object? obj = Activator.CreateInstance(t);
-            Debug.Assert(obj != null);
+            Utils.Assert(obj != null);
 
             foreach (var prop in t.GetProperties())
             {
diff --git a/Z64Utils/F3DZEX/Disassembler/Disassembler.cs b/Z64Utils/F3DZEX/Disassembler/Disassembler.cs
index 8b1824f..abd909a 100644
--- a/Z64Utils/F3DZEX/Disassembler/Disassembler.cs
+++ b/Z64Utils/F3DZEX/Disassembler/Disassembler.cs
@@ -73,7 +73,7 @@ public List<string> Disassemble()
                         if (macroDis != null)
                         {
                             dis = macroDis;
-                            Debug.Assert(cmdCount > 0);
+                            Utils.Assert(cmdCount > 0);
                             toSkip = cmdCount - 1;
                             comments = new List<string>()
                             {
diff --git a/Z64Utils/F3DZEX/Memory.cs b/Z64Utils/F3DZEX/Memory.cs
index 601e85c..78c3eac 100644
--- a/Z64Utils/F3DZEX/Memory.cs
+++ b/Z64Utils/F3DZEX/Memory.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Text;
+using Common;
 using RDP;
 using Z64;
 
@@ -118,7 +119,7 @@ public byte[] ReadBytes(uint vaddr, int count)
                     {
                         case SegmentType.Fill:
                         {
-                            Debug.Assert(seg.Data != null);
+                            Utils.Assert(seg.Data != null);
                             byte[] buff = new byte[count];
                             int rest = count;
                             int dstOff = 0;
@@ -139,7 +140,7 @@ public byte[] ReadBytes(uint vaddr, int count)
                             return buff;
                         }
                         case SegmentType.Buffer:
-                            Debug.Assert(seg.Data != null);
+                            Utils.Assert(seg.Data != null);
                             if (addr.SegmentOff + count <= seg.Data.Length)
                             {
                                 byte[] buff = new byte[count];
diff --git a/Z64Utils/F3DZEX/Render/Renderer.cs b/Z64Utils/F3DZEX/Render/Renderer.cs
index 0369303..836ddb8 100644
--- a/Z64Utils/F3DZEX/Render/Renderer.cs
+++ b/Z64Utils/F3DZEX/Render/Renderer.cs
@@ -7,6 +7,7 @@
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Common;
 using F3DZEX.Command;
 using N64;
 using OpenTK;
@@ -324,12 +325,12 @@ void AssertInitialized()
         {
             if (!_initialized)
                 throw new Exception("Not initialized (yet)!");
-            Debug.Assert(_rdpVtxDrawer != null);
-            Debug.Assert(_gridDrawer != null);
-            Debug.Assert(_axisDrawer != null);
-            Debug.Assert(_textDrawer != null);
-            Debug.Assert(_tex0 != null);
-            Debug.Assert(_tex1 != null);
+            Utils.Assert(_rdpVtxDrawer != null);
+            Utils.Assert(_gridDrawer != null);
+            Utils.Assert(_axisDrawer != null);
+            Utils.Assert(_textDrawer != null);
+            Utils.Assert(_tex0 != null);
+            Utils.Assert(_tex1 != null);
         }
 
         public void ClearErrors() => ErrorMsg = null;
diff --git a/Z64Utils/F3DZEX/Render/TextDrawer.cs b/Z64Utils/F3DZEX/Render/TextDrawer.cs
index f4a6eba..97daf13 100644
--- a/Z64Utils/F3DZEX/Render/TextDrawer.cs
+++ b/Z64Utils/F3DZEX/Render/TextDrawer.cs
@@ -6,6 +6,7 @@
 using System.Linq;
 using System.Runtime.InteropServices;
 using System.Text;
+using Common;
 using OpenTK;
 using OpenTK.Graphics.OpenGL;
 using OpenTK.Mathematics;
@@ -57,9 +58,9 @@ public TextDrawer()
             _tex = new TextureHandler();
 
             TextFont = new Font("Arial", 50);
-            Debug.Assert(_font != null);
-            Debug.Assert(_charSpaces != null);
-            Debug.Assert(_texData != null);
+            Utils.Assert(_font != null);
+            Utils.Assert(_charSpaces != null);
+            Utils.Assert(_texData != null);
 
             _lastStr = null;
             Scale = 0.35f;
diff --git a/Z64Utils/Forms/AnalyzerSettingsForm.cs b/Z64Utils/Forms/AnalyzerSettingsForm.cs
index 9436728..2b33dde 100644
--- a/Z64Utils/Forms/AnalyzerSettingsForm.cs
+++ b/Z64Utils/Forms/AnalyzerSettingsForm.cs
@@ -10,6 +10,7 @@
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
+using Common;
 using F3DZEX.Command;
 
 namespace Z64.Forms
@@ -79,7 +80,7 @@ private void buttonRestrivtive_Click(object sender, EventArgs e)
             foreach (var patternStr in patternsStr)
             {
                 var pattern = Z64ObjectAnalyzer.Config.OpCodePattern.Parse(patternStr);
-                Debug.Assert(pattern != null);
+                Utils.Assert(pattern != null);
                 Result.Patterns.Add(pattern);
             }
             UpdateTextBoxes();
diff --git a/Z64Utils/Forms/CollisionViewerForm.cs b/Z64Utils/Forms/CollisionViewerForm.cs
index 9f07467..d8c7ea2 100644
--- a/Z64Utils/Forms/CollisionViewerForm.cs
+++ b/Z64Utils/Forms/CollisionViewerForm.cs
@@ -128,8 +128,8 @@ private void NewRender()
             {
                 _polygons = new RenderColPoly[_colHeader.NbPolygons];
 
-                Debug.Assert(_colHeader.PolygonsHolder != null);
-                Debug.Assert(_colHeader.VerticesHolder != null);
+                Utils.Assert(_colHeader.PolygonsHolder != null);
+                Utils.Assert(_colHeader.VerticesHolder != null);
                 for (int i = 0; i < _colHeader.NbPolygons; i++)
                 {
                     Z64Object.CollisionPolygonsHolder.CollisionPoly colPoly = _colHeader
diff --git a/Z64Utils/Forms/DListViewerForm.cs b/Z64Utils/Forms/DListViewerForm.cs
index 1824137..fb7beba 100644
--- a/Z64Utils/Forms/DListViewerForm.cs
+++ b/Z64Utils/Forms/DListViewerForm.cs
@@ -136,7 +136,7 @@ void RenderCallback(Matrix4 proj, Matrix4 view)
                 _renderer.ModelMtxStack.Push(
                     Matrix4.CreateTranslation(routine.X, routine.Y, routine.Z)
                 );
-                Debug.Assert(routine.Dlist != null);
+                Utils.Assert(routine.Dlist != null);
                 _renderer.RenderDList(routine.Dlist);
                 _renderer.ModelMtxStack.Pop();
             }
@@ -367,13 +367,13 @@ private void AddRoutineMenuItem_Click(object sender, System.EventArgs e)
             );
             if (form.ShowDialog() == DialogResult.OK)
             {
-                Debug.Assert(form.Result != null);
+                Utils.Assert(form.Result != null);
                 var parts = form.Result.Replace(" ", "").Split(";");
                 int x = 0,
                     y = 0,
                     z = 0;
                 var addr = SegmentedAddress.Parse(parts[0], true);
-                Debug.Assert(addr != null);
+                Utils.Assert(addr != null);
                 if (parts.Length > 1)
                 {
                     x = int.Parse(parts[1]);
@@ -401,12 +401,12 @@ private void EditRoutineMenuItem_Click(object sender, EventArgs e)
 
                 if (form.ShowDialog() == DialogResult.OK)
                 {
-                    Debug.Assert(form.Result != null);
+                    Utils.Assert(form.Result != null);
                     var parts = form.Result.Replace(" ", "").Split(";");
 
                     routine.X = routine.Y = routine.Z = 0;
                     var addr = SegmentedAddress.Parse(parts[0], true);
-                    Debug.Assert(addr != null);
+                    Utils.Assert(addr != null);
                     routine.Address = addr;
 
                     if (parts.Length > 1)
diff --git a/Z64Utils/Forms/MainForm.cs b/Z64Utils/Forms/MainForm.cs
index 785ed23..a67db02 100644
--- a/Z64Utils/Forms/MainForm.cs
+++ b/Z64Utils/Forms/MainForm.cs
@@ -84,8 +84,8 @@ private void UpdateControls(bool inTask = false)
 
         private void UpdateFileList(bool forceReload)
         {
-            Debug.Assert(_game != null);
-            Debug.Assert(_fileItemsText != null);
+            Utils.Assert(_game != null);
+            Utils.Assert(_fileItemsText != null);
 
             if (forceReload)
                 _lastSearch = null;
@@ -153,7 +153,7 @@ private void OpenObjectAnalyzer(Z64Game game, byte[] data, string fileName, stri
 
             if (valueForm.ShowDialog() == DialogResult.OK)
             {
-                Debug.Assert(valueForm.Result != null);
+                Utils.Assert(valueForm.Result != null);
                 var form = new ObjectAnalyzerForm(
                     game,
                     data,
@@ -237,7 +237,7 @@ private void RomOpenItem_Click(object sender, EventArgs e)
 
         private void RomSaveItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             saveFileDialog1.FileName = "";
             saveFileDialog1.Filter = $"{Filters.N64}|{Filters.ALL}";
             if (saveFileDialog1.ShowDialog() == DialogResult.OK)
@@ -250,7 +250,7 @@ private void RomSaveItem_Click(object sender, EventArgs e)
 
         private void RomExportFsItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             folderBrowserDialog1.SelectedPath = "";
             if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
             {
@@ -280,7 +280,7 @@ private void RomExportFsItem_Click(object sender, EventArgs e)
 
         private void RomImportNamesItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             openFileDialog1.FileName = "";
             openFileDialog1.Filter = $"{Filters.TXT}|{Filters.ALL}";
             if (openFileDialog1.ShowDialog() == DialogResult.OK)
@@ -292,7 +292,7 @@ private void RomImportNamesItem_Click(object sender, EventArgs e)
 
         private void RomExportNamesItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             saveFileDialog1.FileName = "";
             saveFileDialog1.Filter = $"{Filters.TXT}|{Filters.ALL}";
             if (saveFileDialog1.ShowDialog() == DialogResult.OK)
@@ -303,7 +303,7 @@ private void RomExportNamesItem_Click(object sender, EventArgs e)
 
         private void InjectToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             if (listView_files.SelectedIndices.Count != 1)
                 return;
             var item = listView_files.SelectedItems[0];
@@ -320,7 +320,7 @@ private void InjectToolStripMenuItem_Click(object sender, EventArgs e)
 
         private void SaveToolStripMenuItem1_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             if (listView_files.SelectedIndices.Count != 1)
                 return;
             var item = listView_files.SelectedItems[0];
@@ -362,7 +362,7 @@ private void OpenObjectViewerForExternalFile(byte[] data, string fileName)
 
             if (valueForm.ShowDialog() == DialogResult.OK)
             {
-                Debug.Assert(valueForm.Result != null);
+                Utils.Assert(valueForm.Result != null);
                 var form = new ObjectAnalyzerForm(
                     _game,
                     data,
@@ -376,7 +376,7 @@ private void OpenObjectViewerForExternalFile(byte[] data, string fileName)
 
         private void OpenObjectViewerToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             if (listView_files.SelectedIndices.Count != 1)
                 return;
             var item = listView_files.SelectedItems[0];
@@ -401,7 +401,7 @@ private void OpenObjectViewerToolStripMenuItem_Click(object sender, EventArgs e)
 
         private void renameToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             if (listView_files.SelectedIndices.Count != 1)
                 return;
             var item = listView_files.SelectedItems[0];
@@ -416,7 +416,7 @@ private void renameToolStripMenuItem_Click(object sender, EventArgs e)
             );
             if (valueForm.ShowDialog() == DialogResult.OK)
             {
-                Debug.Assert(valueForm.Result != null);
+                Utils.Assert(valueForm.Result != null);
                 _game.Version.RenameFile(file.VRomStart, valueForm.Result);
                 listView_files.SelectedItems[0].Text = valueForm.Result;
             }
@@ -429,7 +429,7 @@ private void TextBox_fileFilter_TextChanged(object sender, EventArgs e)
 
         private void OpenDlistViewerToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             DListViewerForm.OpenInstance(_game);
         }
 
@@ -440,13 +440,13 @@ private void f3DEXDisassemblerToolStripMenuItem_Click(object sender, EventArgs e
 
         private void ROMRAMConversionsToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             new ConversionForm(_game).Show();
         }
 
         private void textureViewerToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             new TextureViewer(_game).Show();
         }
 
@@ -492,7 +492,7 @@ private void objectAnalyzerToolStripMenuItem_Click(object sender, EventArgs e)
 
         private void listView_files_DoubleClick(object sender, EventArgs e)
         {
-            Debug.Assert(_game != null);
+            Utils.Assert(_game != null);
             if (listView_files.SelectedIndices.Count != 1)
                 return;
             var item = listView_files.SelectedItems[0];
diff --git a/Z64Utils/Forms/ModelViewerControl.cs b/Z64Utils/Forms/ModelViewerControl.cs
index b154afd..cb3176b 100644
--- a/Z64Utils/Forms/ModelViewerControl.cs
+++ b/Z64Utils/Forms/ModelViewerControl.cs
@@ -18,6 +18,8 @@ namespace Z64.Forms
 {
     public partial class ModelViewerControl : GLControl
     {
+        private static readonly NLog.Logger Logger = NLog.LogManager.GetCurrentClassLogger();
+
         public Matrix4 Projection => _projectionMtx;
         public Matrix4 View => _viewMtx;
 
@@ -120,7 +122,7 @@ public void Render()
             }
             catch (Exception ex)
             {
-                Console.WriteLine(ex.Message);
+                Logger.Warn(ex);
             }
 
             if (Height == 0)
diff --git a/Z64Utils/Forms/ObjectAnalyzerForm.cs b/Z64Utils/Forms/ObjectAnalyzerForm.cs
index 9e1b293..e66c96e 100644
--- a/Z64Utils/Forms/ObjectAnalyzerForm.cs
+++ b/Z64Utils/Forms/ObjectAnalyzerForm.cs
@@ -613,18 +613,18 @@ private void listView_map_SelectedIndexChanged(object sender, EventArgs e)
                     sw.WriteLine($"Sibling: 0x{limb.Sibling:X2}");
                     if (limb.Type != Z64Object.EntryType.SkinLimb)
                     {
-                        Debug.Assert(limb.DListSeg != null);
+                        Utils.Assert(limb.DListSeg != null);
                         sw.WriteLine($"DList : 0x{limb.DListSeg.VAddr:X8}");
                     }
 
                     if (limb.Type == Z64Object.EntryType.LODLimb)
                     {
-                        Debug.Assert(limb.DListFarSeg != null);
+                        Utils.Assert(limb.DListFarSeg != null);
                         sw.WriteLine($"Far DList : 0x{limb.DListFarSeg.VAddr:X8}");
                     }
                     else if (limb.Type == Z64Object.EntryType.SkinLimb)
                     {
-                        Debug.Assert(limb.SkinSeg != null);
+                        Utils.Assert(limb.SkinSeg != null);
                         sw.WriteLine($"Data Type : {limb.SegmentType}"); // TODO describe data instead of printing number?
                         sw.WriteLine($"Data Segment : 0x{limb.SkinSeg.VAddr:X8}");
                     }
@@ -728,13 +728,13 @@ private void openSkeletonViewerMenuItem_Click(object sender, EventArgs e)
         private void openSkeletonViewer()
         {
             var holder = GetCurrentHolder<Z64Object.ObjectHolder>();
-            Debug.Assert(holder != null);
+            Utils.Assert(holder != null);
             switch (holder.GetEntryType())
             {
                 case Z64Object.EntryType.FlexSkeletonHeader:
                 {
                     var skel = GetCurrentHolder<Z64Object.FlexSkeletonHolder>();
-                    Debug.Assert(skel != null);
+                    Utils.Assert(skel != null);
                     List<Z64Object.AnimationHolder> anims = new List<Z64Object.AnimationHolder>();
                     _obj.Entries.ForEach(e =>
                     {
@@ -755,7 +755,7 @@ private void openSkeletonViewer()
                 case Z64Object.EntryType.SkeletonHeader:
                 {
                     var skel = GetCurrentHolder<Z64Object.SkeletonHolder>();
-                    Debug.Assert(skel != null);
+                    Utils.Assert(skel != null);
                     List<Z64Object.AnimationHolder> anims = new List<Z64Object.AnimationHolder>();
                     _obj.Entries.ForEach(e =>
                     {
@@ -779,7 +779,7 @@ private void openSkeletonViewer()
         private void addToDisplayViewerMenuItem_Click(object sender, EventArgs e)
         {
             var holder = GetCurrentHolder<Z64Object.ObjectHolder>();
-            Debug.Assert(holder != null);
+            Utils.Assert(holder != null);
             if (holder.GetEntryType() == Z64Object.EntryType.DList)
             {
                 DListViewerForm.OpenInstance(_game);
@@ -789,7 +789,7 @@ private void addToDisplayViewerMenuItem_Click(object sender, EventArgs e)
                 );
 
                 var dlist = GetCurrentHolder<Z64Object.DListHolder>();
-                Debug.Assert(dlist != null);
+                Utils.Assert(dlist != null);
                 DListViewerForm.Instance.AddDList(
                     new SegmentedAddress(_segment, _obj.OffsetOf(dlist)).VAddr
                 );
@@ -804,7 +804,7 @@ private void openInDisplayViewerMenuItem_Click(object sender, EventArgs e)
         private void openDisplayList()
         {
             var holder = GetCurrentHolder<Z64Object.ObjectHolder>();
-            Debug.Assert(holder != null);
+            Utils.Assert(holder != null);
             if (holder.GetEntryType() == Z64Object.EntryType.DList)
             {
                 DListViewerForm.OpenInstance(_game);
@@ -814,7 +814,7 @@ private void openDisplayList()
                 );
 
                 var dlist = GetCurrentHolder<Z64Object.DListHolder>();
-                Debug.Assert(dlist != null);
+                Utils.Assert(dlist != null);
                 DListViewerForm.Instance.SetSingleDlist(
                     new SegmentedAddress(_segment, _obj.OffsetOf(dlist)).VAddr
                 );
@@ -829,7 +829,7 @@ private void showInCollisionViewerToolStripMenuItem_Click(object sender, EventAr
         private void openCollisionHeader()
         {
             var holder = GetCurrentHolder<Z64Object.ColHeaderHolder>();
-            Debug.Assert(holder != null);
+            Utils.Assert(holder != null);
             if (holder.GetEntryType() == Z64Object.EntryType.CollisionHeader)
             {
                 CollisionViewerForm.OpenInstance(_game);
@@ -1004,7 +1004,7 @@ private void exportCToolStripMenuItem_Click(object sender, EventArgs e)
                         case Z64Object.EntryType.StandardLimb:
                         {
                             var holder = (Z64Object.SkeletonLimbHolder)entry;
-                            Debug.Assert(holder.DListSeg != null);
+                            Utils.Assert(holder.DListSeg != null);
                             sw.WriteLine(
                                 $"StandardLimb {entry.Name} = {{ {{ {holder.JointX}, {holder.JointY}, {holder.JointZ} }}, {holder.Child}, {holder.Sibling}, 0x{holder.DListSeg.VAddr:X8} }};"
                             );
@@ -1013,8 +1013,8 @@ private void exportCToolStripMenuItem_Click(object sender, EventArgs e)
                         case Z64Object.EntryType.LODLimb:
                         {
                             var holder = (Z64Object.SkeletonLimbHolder)entry;
-                            Debug.Assert(holder.DListSeg != null);
-                            Debug.Assert(holder.DListFarSeg != null);
+                            Utils.Assert(holder.DListSeg != null);
+                            Utils.Assert(holder.DListFarSeg != null);
                             sw.WriteLine(
                                 $"LodLimb {entry.Name} = {{ {{ {holder.JointX}, {holder.JointY}, {holder.JointZ} }}, {holder.Child}, {holder.Sibling}, 0x{holder.DListSeg.VAddr:X8}, 0x{holder.DListFarSeg.VAddr:X8} }};"
                             );
@@ -1023,7 +1023,7 @@ private void exportCToolStripMenuItem_Click(object sender, EventArgs e)
                         case Z64Object.EntryType.SkinLimb:
                         {
                             var holder = (Z64Object.SkeletonLimbHolder)entry;
-                            Debug.Assert(holder.SkinSeg != null);
+                            Utils.Assert(holder.SkinSeg != null);
                             sw.WriteLine(
                                 $"SkinLimb {entry.Name} = {{ {{ {holder.JointX}, {holder.JointY}, {holder.JointZ} }}, {holder.Child}, {holder.Sibling}, 0x{holder.SegmentType}, 0x{holder.SkinSeg.VAddr:X8} }};"
                             );
diff --git a/Z64Utils/Forms/SegmentControl.cs b/Z64Utils/Forms/SegmentControl.cs
index 55f00cc..994ef6b 100644
--- a/Z64Utils/Forms/SegmentControl.cs
+++ b/Z64Utils/Forms/SegmentControl.cs
@@ -59,7 +59,7 @@ private void importFileButton_Click(object sender, EventArgs e)
             form.Text += " " + SegmentID;
             if (form.ShowDialog() == DialogResult.OK)
             {
-                Debug.Assert(form.ResultSegment != null);
+                Utils.Assert(form.ResultSegment != null);
                 SetSegment(form.ResultSegment);
                 SegmentChanged?.Invoke(this, new(_segmentId, form.ResultSegment));
             }
diff --git a/Z64Utils/Forms/SegmentEditForm.cs b/Z64Utils/Forms/SegmentEditForm.cs
index 9b95726..c429d7f 100644
--- a/Z64Utils/Forms/SegmentEditForm.cs
+++ b/Z64Utils/Forms/SegmentEditForm.cs
@@ -104,12 +104,12 @@ private void button1_Click(object sender, EventArgs e)
         {
             if (comboBox1.SelectedItem == (object)SRC_ROM_FS) // ROM FS
             {
-                Debug.Assert(_game != null);
+                Utils.Assert(_game != null);
                 DmaFileSelectForm form = new DmaFileSelectForm(_game);
                 if (form.ShowDialog() == DialogResult.OK)
                 {
-                    Debug.Assert(form.SelectedFile != null);
-                    Debug.Assert(form.SelectedFile.Valid()); // DmaFileSelectForm only allows selecting valid files
+                    Utils.Assert(form.SelectedFile != null);
+                    Utils.Assert(form.SelectedFile.Valid()); // DmaFileSelectForm only allows selecting valid files
                     _dmaFileName = _game.GetFileName(form.SelectedFile.VRomStart);
                     ResultSegment = Memory.Segment.FromBytes(_dmaFileName, form.SelectedFile.Data);
                     button1.ForeColor = Color.Green;
@@ -153,7 +153,7 @@ private void okBtn_Click(object sender, EventArgs e)
             {
                 case SRC_ADDR:
                     var sa = SegmentedAddress.Parse(addressValue.Text);
-                    Debug.Assert(sa != null); // OK button is only enabled if the value is valid
+                    Utils.Assert(sa != null); // OK button is only enabled if the value is valid
                     uint addr = sa.VAddr;
                     ResultSegment = Memory.Segment.FromVram($"{addr:X8}", addr);
                     break;
diff --git a/Z64Utils/Forms/SkeletonViewerForm.cs b/Z64Utils/Forms/SkeletonViewerForm.cs
index 05dfd7a..ee80683 100644
--- a/Z64Utils/Forms/SkeletonViewerForm.cs
+++ b/Z64Utils/Forms/SkeletonViewerForm.cs
@@ -5,6 +5,7 @@
 using System.Drawing;
 using System.IO;
 using System.Windows.Forms;
+using Common;
 using OpenTK;
 using OpenTK.Graphics.OpenGL;
 using OpenTK.Mathematics;
@@ -272,7 +273,7 @@ void UpdateCurPose()
                     }
                     else
                     {
-                        Debug.Assert(_curPlayerAnim != null);
+                        Utils.Assert(_curPlayerAnim != null);
                         _curPose = Z64SkeletonPose
                             .Get(_skeleton, _curPlayerAnim, trackBar_anim.Value)
                             .LimbsPose;
@@ -372,7 +373,7 @@ void UpdateLimbsDlists()
             {
                 if (limb.Type != EntryType.StandardLimb && limb.Type != EntryType.LODLimb)
                     throw new Exception($"Unimplemented limb type in skeleton viewer {limb.Type}");
-                Debug.Assert(limb.DListSeg != null); // always set for Standard and LOD limbs
+                Utils.Assert(limb.DListSeg != null); // always set for Standard and LOD limbs
                 F3DZEX.Command.Dlist? dlist = null;
                 try
                 {
@@ -431,7 +432,7 @@ void AddLimbRoutine(TreeNode parent, Z64SkeletonTreeLimb treeLimb)
         // Update anims -> matrices
         void UpdateRegularAnim()
         {
-            Debug.Assert(_curRegularAnim != null);
+            Utils.Assert(_curRegularAnim != null);
 
             trackBar_anim.Minimum = 0;
             trackBar_anim.Maximum = _curRegularAnim.FrameCount - 1;
@@ -442,7 +443,7 @@ void UpdateRegularAnim()
 
         void UpdatePlayerAnim()
         {
-            Debug.Assert(_curPlayerAnim != null);
+            Utils.Assert(_curPlayerAnim != null);
 
             trackBar_anim.Minimum = 0;
             trackBar_anim.Maximum = _curPlayerAnim.FrameCount - 1;
@@ -611,7 +612,7 @@ private void listBox_anims_SelectedIndexChanged(object sender, EventArgs e)
 
                     if (savedSegment != null)
                     {
-                        Debug.Assert(savedData != null);
+                        Utils.Assert(savedData != null);
                         _renderer.Memory.Segments[(int)savedSegment] = savedData;
                     }
 
@@ -622,7 +623,7 @@ private void listBox_anims_SelectedIndexChanged(object sender, EventArgs e)
                 {
                     var curPlayerAnimationEntry =
                         curAnimEntry as ISkeletonViewerPlayerAnimationEntry;
-                    Debug.Assert(curPlayerAnimationEntry != null);
+                    Utils.Assert(curPlayerAnimationEntry != null);
 
                     var curPAH = curPlayerAnimationEntry.GetPlayerAnim();
 
@@ -631,8 +632,8 @@ private void listBox_anims_SelectedIndexChanged(object sender, EventArgs e)
 
                     var Saved = _renderer.Memory.Segments[curPAH.PlayerAnimationSegment.SegmentId];
                     var link_animetionFile = _game.GetFileByName("link_animetion");
-                    Debug.Assert(link_animetionFile != null);
-                    Debug.Assert(link_animetionFile.Valid());
+                    Utils.Assert(link_animetionFile != null);
+                    Utils.Assert(link_animetionFile.Valid());
                     _renderer.Memory.Segments[curPAH.PlayerAnimationSegment.SegmentId] =
                         F3DZEX.Memory.Segment.FromBytes("link_animetion", link_animetionFile.Data);
 
diff --git a/Z64Utils/Forms/TextureViewer.cs b/Z64Utils/Forms/TextureViewer.cs
index 4f1763e..290f392 100644
--- a/Z64Utils/Forms/TextureViewer.cs
+++ b/Z64Utils/Forms/TextureViewer.cs
@@ -9,6 +9,7 @@
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
+using Common;
 using N64;
 
 namespace Z64.Forms
@@ -45,7 +46,7 @@ private byte[] ReadBytes(uint addr, int size)
                     if (addr >= file.VRomStart && addr < file.VRomEnd)
                     {
                         byte[] buffer = new byte[size];
-                        Debug.Assert(file.Valid());
+                        Utils.Assert(file.Valid());
                         Buffer.BlockCopy(
                             file.Data,
                             (int)(addr - (uint)file.VRomStart),
diff --git a/Z64Utils/N64/N64Texture.cs b/Z64Utils/N64/N64Texture.cs
index 8740d47..1579434 100644
--- a/Z64Utils/N64/N64Texture.cs
+++ b/Z64Utils/N64/N64Texture.cs
@@ -7,6 +7,7 @@
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Common;
 using F3DZEX.Command;
 using Syroot.BinaryData;
 
@@ -245,10 +246,10 @@ public static byte[] Decode(
                     switch (siz)
                     {
                         case G_IM_SIZ.G_IM_SIZ_4b:
-                            Debug.Assert(tlut != null);
+                            Utils.Assert(tlut != null);
                             return DecodeCI4(texels, buff, tlut);
                         case G_IM_SIZ.G_IM_SIZ_8b:
-                            Debug.Assert(tlut != null);
+                            Utils.Assert(tlut != null);
                             return DecodeCI8(texels, buff, tlut);
                         default:
                             throw new N64TextureException(
diff --git a/Z64Utils/NLog-Debug.config b/Z64Utils/NLog-Debug.config
new file mode 100644
index 0000000..00d46d9
--- /dev/null
+++ b/Z64Utils/NLog-Debug.config
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- NLog-Debug.config -->
+<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
+    autoReload="false"
+    throwExceptions="false"
+    throwConfigExceptions="true"
+    internalLogLevel="Off" internalLogFile="nlog-internal.log"
+>
+
+    <!--
+        NLog Documentation:
+        https://github.com/NLog/NLog/wiki
+        List of targets (where to write logs): https://nlog-project.org/config/?tab=targets
+        List of layout renderers (used as `${...}`): https://nlog-project.org/config/?tab=layout-renderers
+    -->
+
+    <variable name="verbose_layout"
+        value="${longdate} ${logger} ${callsite}:${callsite-linenumber} ${level} ${message:withException=true}" />
+
+    <targets>
+        <target xsi:type="AsyncWrapper"
+            name="logfile_async"
+            overflowAction="Discard"
+        >
+            <target name="logfile" xsi:type="File" fileName="${basedir}/logs/${shortdate}.txt"
+                layout="${verbose_layout}" />
+        </target>
+        <target name="logconsole" xsi:type="Console" layout="${verbose_layout}" />
+    </targets>
+
+    <rules>
+        <logger name="*" minlevel="Info" writeTo="logconsole" />
+        <logger name="*" minlevel="Debug" writeTo="logfile_async" />
+    </rules>
+
+</nlog>
\ No newline at end of file
diff --git a/Z64Utils/NLog-Release.config b/Z64Utils/NLog-Release.config
new file mode 100644
index 0000000..532a8f5
--- /dev/null
+++ b/Z64Utils/NLog-Release.config
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- NLog-Release.config -->
+<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
+    autoReload="false"
+    throwExceptions="false"
+    throwConfigExceptions="true"
+    internalLogLevel="Off" internalLogFile="nlog-internal.log"
+>
+
+    <!--
+        NLog Documentation:
+        https://github.com/NLog/NLog/wiki
+        List of targets (where to write logs): https://nlog-project.org/config/?tab=targets
+        List of layout renderers (used as `${...}`): https://nlog-project.org/config/?tab=layout-renderers
+    -->
+
+    <variable name="verbose_layout"
+        value="${longdate} ${logger} ${callsite}:${callsite-linenumber} ${level} ${message:withException=true}" />
+
+    <targets>
+        <target xsi:type="AsyncWrapper"
+            name="logfile_async"
+            overflowAction="Discard"
+        >
+            <target name="logfile" xsi:type="File" fileName="${basedir}/logs/${shortdate}.txt"
+                layout="${verbose_layout}" />
+        </target>
+        <target name="logconsole" xsi:type="Console" layout="${verbose_layout}" />
+    </targets>
+
+    <rules>
+        <logger name="*" minlevel="Warn" writeTo="logconsole" />
+        <logger name="*" minlevel="Info" writeTo="logfile_async" />
+    </rules>
+
+</nlog>
\ No newline at end of file
diff --git a/Z64Utils/Program.cs b/Z64Utils/Program.cs
index 79053c3..53f3936 100644
--- a/Z64Utils/Program.cs
+++ b/Z64Utils/Program.cs
@@ -7,6 +7,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Forms;
+using Common;
 using Z64;
 using Z64.Forms;
 
@@ -14,6 +15,7 @@ namespace Z64
 {
     static class Program
     {
+        private static readonly NLog.Logger Logger = NLog.LogManager.GetCurrentClassLogger();
         public static readonly string Version =
             Assembly
                 .GetExecutingAssembly()
@@ -31,6 +33,24 @@ static class Program
         /// </summary>
         [STAThread]
         static void Main()
+        {
+            try
+            {
+                Logger.Info("Starting up Z64Utils Version {Version}...", Version);
+                MainImpl();
+            }
+            catch (Exception e)
+            {
+                Logger.Fatal(e);
+                throw;
+            }
+            finally
+            {
+                NLog.LogManager.Shutdown();
+            }
+        }
+
+        static void MainImpl()
         {
             Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("en-US");
 
diff --git a/Z64Utils/Z64/Z64Game.cs b/Z64Utils/Z64/Z64Game.cs
index e91d994..2ac9096 100644
--- a/Z64Utils/Z64/Z64Game.cs
+++ b/Z64Utils/Z64/Z64Game.cs
@@ -215,7 +215,7 @@ public void InjectFile(int vrom, byte[] data)
             if (file == null)
                 throw new Z64GameException("Invalid VROM");
 
-            Debug.Assert(file.Data != null);
+            Utils.Assert(file.Data != null);
 
             int oldSize = file.Compressed ? file.RomEnd - file.RomStart : file.Data.Length;
 
@@ -273,8 +273,8 @@ public void InjectFile(int vrom, byte[] data)
         private void FixDmaDataTable()
         {
             var dmatable = GetFile(GetVrom("dmadata"));
-            Debug.Assert(dmatable != null);
-            Debug.Assert(dmatable.Valid());
+            Utils.Assert(dmatable != null);
+            Utils.Assert(dmatable.Valid());
 
             byte[] newTable;
             using (MemoryStream ms = new MemoryStream())
@@ -363,7 +363,7 @@ private void GetFs(BinaryStream br, Action<float, string>? progressCalback = nul
                 {
                     if (i == 2) //dmadata
                     {
-                        Debug.Assert(file.Data != null);
+                        Utils.Assert(file.Data != null);
                         filecount = file.Data.Length / 0x10;
 
                         lastprogressI = -filecount; // force a progress update
diff --git a/Z64Utils/Z64/Z64Object.cs b/Z64Utils/Z64/Z64Object.cs
index 8ce2065..b62264c 100644
--- a/Z64Utils/Z64/Z64Object.cs
+++ b/Z64Utils/Z64/Z64Object.cs
@@ -299,7 +299,7 @@ public class SkeletonLimbHolder : ObjectHolder
             public SkeletonLimbHolder(string name, byte[] data, EntryType type)
                 : base(name)
             {
-                Debug.Assert(
+                Utils.Assert(
                     type == EntryType.StandardLimb
                         || type == EntryType.LODLimb
                         || type == EntryType.SkinLimb
@@ -323,19 +323,19 @@ public override byte[] GetData()
 
                     if (Type != EntryType.SkinLimb)
                     {
-                        Debug.Assert(DListSeg != null);
+                        Utils.Assert(DListSeg != null);
                         bw.Write(DListSeg.VAddr);
                     }
 
                     if (Type == EntryType.LODLimb)
                     {
-                        Debug.Assert(DListFarSeg != null);
+                        Utils.Assert(DListFarSeg != null);
                         bw.Write(DListFarSeg.VAddr);
                     }
                     else if (Type == EntryType.SkinLimb)
                     {
-                        Debug.Assert(SegmentType != null);
-                        Debug.Assert(SkinSeg != null);
+                        Utils.Assert(SegmentType != null);
+                        Utils.Assert(SkinSeg != null);
                         bw.Write((int)SegmentType);
                         bw.Write(SkinSeg.VAddr);
                     }
diff --git a/Z64Utils/Z64/Z64ObjectAnalyzer.cs b/Z64Utils/Z64/Z64ObjectAnalyzer.cs
index 68219a2..61e0f9d 100644
--- a/Z64Utils/Z64/Z64ObjectAnalyzer.cs
+++ b/Z64Utils/Z64/Z64ObjectAnalyzer.cs
@@ -627,7 +627,7 @@ public static void FindPlayerAnimations(Z64Object obj, byte[] data, int segmentI
         {
             if (obj.Game == null)
                 return;
-            Debug.Assert(obj.FileName != null);
+            Utils.Assert(obj.FileName != null);
 
             // only search in gameplay_keep
             if (!obj.FileName.Contains("gameplay_keep"))
@@ -681,7 +681,7 @@ public static void FindCollisionData(Z64Object obj, byte[] data, int segmentId)
                 if (!obj.IsOffsetFree(i))
                 {
                     Z64Object.ObjectHolder? holder = obj.GetHolderAtOffset(i);
-                    Debug.Assert(holder != null);
+                    Utils.Assert(holder != null);
                     i = obj.OffsetOf(holder) + holder.GetSize();
                     if (i % 4 != 0)
                         i += (4 - i % 4);
@@ -859,7 +859,7 @@ Dictionary<int, SegmentedTextureAttrs> textureLoads
                 if (!obj.IsOffsetFree(i))
                 {
                     Z64Object.ObjectHolder? holder = obj.GetHolderAtOffset(i);
-                    Debug.Assert(holder != null);
+                    Utils.Assert(holder != null);
                     i = obj.OffsetOf(holder) + holder.GetSize();
                     if (i % 4 != 0)
                         i += (4 - i % 4);
diff --git a/Z64Utils/Z64/Z64Version.cs b/Z64Utils/Z64/Z64Version.cs
index 3f2f7ef..f3ca120 100644
--- a/Z64Utils/Z64/Z64Version.cs
+++ b/Z64Utils/Z64/Z64Version.cs
@@ -42,6 +42,8 @@ public enum Z64FileCompression
 
     public class Z64Version
     {
+        private static readonly NLog.Logger Logger = NLog.LogManager.GetCurrentClassLogger();
+
         #region JSON Data Type
 
         private class AddrToStringConverter : JsonConverter<uint?>
@@ -101,8 +103,8 @@ public class VersionIdentifier
             [MemberNotNull(nameof(BuildDate))]
             public void AssertValid()
             {
-                Debug.Assert(BuildTeam != null);
-                Debug.Assert(BuildDate != null);
+                Utils.Assert(BuildTeam != null);
+                Utils.Assert(BuildDate != null);
             }
         }
 
@@ -189,8 +191,8 @@ public Z64Version()
         [MemberNotNull(nameof(Identifier))]
         public void AssertValid()
         {
-            Debug.Assert(VersionName != null);
-            Debug.Assert(Identifier != null);
+            Utils.Assert(VersionName != null);
+            Utils.Assert(Identifier != null);
         }
 
         #endregion JSON Properties
@@ -297,7 +299,7 @@ public void Save()
             };
             options.Converters.Add(new JsonStringEnumConverter());
 
-            Debug.Assert(_versions != null);
+            Utils.Assert(_versions != null);
             string path = _versions.First(v => v.Value == this).Key;
 
             // sort entries by vrom
@@ -352,7 +354,7 @@ private static void LoadVersions()
             {
                 string json = File.ReadAllText(file);
                 var ver = JsonSerializer.Deserialize<Z64Version>(json, options);
-                Debug.Assert(ver != null);
+                Utils.Assert(ver != null);
                 ver.AssertValid();
                 ver.Identifier.AssertValid();
 
@@ -515,7 +517,7 @@ private static void ExportHashes(Z64Game game)
 
                     if (file.Data.Length <= 0x10)
                     {
-                        Debug.WriteLine($"Skipping small file {name}");
+                        Logger.Debug($"Skipping small file {name}");
                         continue;
                     }
 
@@ -527,7 +529,7 @@ private static void ExportHashes(Z64Game game)
                     {
                         if (existing.fileName != entry.fileName)
                         {
-                            Debug.WriteLine(
+                            Logger.Debug(
                                 $"name missmatch : {existing.fileName} ({existing.sha256}) -> {entry.fileName}"
                             );
                         }
@@ -536,7 +538,7 @@ private static void ExportHashes(Z64Game game)
                             && existing.type == Z64FileType.Unknow
                         )
                         {
-                            Debug.WriteLine($"new type found : {existing.type} -> {entry.type}");
+                            Logger.Debug($"new type found : {existing.type} -> {entry.type}");
                             entries.Remove(existing);
                             entries.Add(entry);
                             modifCount++;
@@ -552,7 +554,7 @@ private static void ExportHashes(Z64Game game)
 
             FileHashEntry.WriteEntries(hashPath, entries);
 
-            Debug.WriteLine($"{addCount} hash exported and {modifCount} hashes modifed!");
+            Logger.Debug($"{addCount} hash exported and {modifCount} hashes modifed!");
 #endif
         }
 
@@ -608,7 +610,7 @@ private static void ImportHashes(Z64Game game)
                 }
             }
 
-            Debug.WriteLine($"{foundCount} hashes imported!");
+            Logger.Debug($"{foundCount} hashes imported!");
 
             game.Version.Save();
 #endif
diff --git a/Z64Utils/Z64Utils.csproj b/Z64Utils/Z64Utils.csproj
index b241157..52fa514 100644
--- a/Z64Utils/Z64Utils.csproj
+++ b/Z64Utils/Z64Utils.csproj
@@ -26,11 +26,20 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Be.Windows.Forms.HexBox" Version="1.6.1" />
+    <PackageReference Include="NLog" Version="5.5.0" />
     <PackageReference Include="OpenTK" Version="4.9.3" />
     <PackageReference Include="OpenTK.GLControl" Version="4.0.2" />
     <PackageReference Include="Syroot.BinaryData" Version="5.2.2" />
     <PackageReference Include="System.Drawing.Common" Version="6.0.0" />
   </ItemGroup>
+
+  <Target Name="CopyNLogConfigToBuildOutput" AfterTargets="Build">
+    <Copy SourceFiles="NLog-$(Configuration).config" DestinationFiles="$(OutDir)/NLog.config" />
+  </Target>
+  <Target Name="CopyNLogConfigToPublishOutput" AfterTargets="Publish">
+    <Copy SourceFiles="NLog-$(Configuration).config" DestinationFiles="$(PublishDir)/NLog.config" />
+  </Target>
+
   <ItemGroup>
     <Compile Update="Properties\Resources.Designer.cs">
       <DesignTime>True</DesignTime>