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diff --git a/IDE/src/ui/ErrorsPanel.bf b/IDE/src/ui/ErrorsPanel.bf
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+++ b/IDE/src/ui/ErrorsPanel.bf
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+using Beefy.widgets;
+using Beefy.theme.dark;
+using IDE.Compiler;
+using System.Collections.Generic;
+using System.Threading;
+using System;
+using Beefy.gfx;
+using System.IO;
+using Beefy.utils;
+
+namespace IDE.ui
+{
+	class ErrorsPanel : Panel
+	{
+		public class ErrorsListView : IDEListView
+		{
+			protected override ListViewItem CreateListViewItem()
+			{
+				return new ErrorsListViewItem();
+			}
+		}
+
+		public class ErrorsListViewItem : IDEListViewItem
+		{
+			public String mFilePath ~ delete _;
+			public int mLine;
+			public int mColumn;
+
+			public override void DrawSelect(Graphics g)
+			{
+				bool hasFocus = mListView.mHasFocus;
+				if ((mWidgetWindow.mFocusWidget != null) && (mWidgetWindow.mFocusWidget.HasParent(mListView)))
+					hasFocus = true;
+			    using (g.PushColor(hasFocus ? 0xFFFFFFFF : 0x80FFFFFF))
+			        base.DrawSelect(g);
+			}
+			
+			public bool Goto()
+			{
+				if (mFilePath == null)
+					return false;
+				gApp.ShowSourceFileLocation(mFilePath, -1, -1, mLine, mColumn, .Always);
+				return false;
+			}
+		}
+
+		public DarkDockingFrame mDockingFrame;
+		public ErrorsListView mErrorLV;
+		public OutputWidget mOutputWidget;
+
+		public bool mNeedsResolveAll;
+		public bool mErrorsDirty;
+		public Monitor mMonitor = new .() ~ delete _;
+		public List<BfPassInstance.BfError> mErrorList = new .() ~ DeleteContainerAndItems!(_);
+		public int mDirtyTicks;
+
+		public int mErrorCount;
+		public int mWarningCount;
+
+		public this()
+		{
+			mErrorLV = new .();
+			//mErrorLV.mPanel = this;
+			//mErrorLV.SetShowHeader(false);
+			mErrorLV.InitScrollbars(true, true);
+			mErrorLV.mLabelX = GS!(6);
+			//mErrorLV.mOnItemMouseDown.Add(new => ItemMouseDown);
+			mErrorLV.mOnItemMouseClicked.Add(new => ListViewItemMouseClicked);
+			mErrorLV.mOnKeyDown.Add(new => ListViewKeyDown_ShowMenu);
+			mErrorLV.AddColumn(100, "Code");
+			mErrorLV.AddColumn(400, "Description");
+			mErrorLV.AddColumn(100, "Project");
+			mErrorLV.AddColumn(120, "File");
+			mErrorLV.AddColumn(40, "Line");
+			mErrorLV.mOnItemMouseDown.Add(new (item, x, y, btnNum, btnCount) =>
+				{
+					if ((btnNum == 0) && (btnCount == 2))
+					{
+						let mainItem = (ErrorsListViewItem)item.GetSubItem(0);
+						mainItem.Goto();
+					}
+
+					ListViewItemMouseDown(item, x, y, btnNum, btnCount);
+					//mErrorLV.GetRoot().SelectItemExclusively()
+				});
+			//let newItem = mErrorLV.GetRoot().CreateChildItem();
+			//newItem.Label = "Hey";
+
+			mOutputWidget = new .();
+			
+			var errorDock = new DockingProxy(mErrorLV);
+			var detailsDock = new DockingProxy(mOutputWidget);
+
+			mDockingFrame = new DarkDockingFrame();
+			mDockingFrame.mDrawBkg = false;
+			mDockingFrame.AddDockedWidget(errorDock, null, .Top);
+			mDockingFrame.AddDockedWidget(detailsDock, errorDock, .Bottom);
+			AddWidget(mDockingFrame);
+		}
+
+		public override void Serialize(StructuredData data)
+		{
+		    base.Serialize(data);
+
+		    data.Add("Type", "ErrorsPanel");
+		}
+
+		public override void Resize(float x, float y, float width, float height)
+		{
+			base.Resize(x, y, width, height);
+			mDockingFrame.Resize(0, 0, width, height);
+		}
+
+		public enum ResolveKind
+		{
+			None,
+			Parse,
+			Resolve
+		}
+
+		public void ProcessPassInstance(BfPassInstance passInstance, BfPassInstance.PassKind passKind)
+		{
+			using (mMonitor.Enter())
+			{
+				mErrorCount = 0;
+				mWarningCount = 0;
+
+				int32 errorCount = passInstance.GetErrorCount();
+				ClearAndDeleteItems(mErrorList);
+				mErrorList.Capacity = mErrorList.Count;
+
+				for (int32 errorIdx = 0; errorIdx < errorCount; errorIdx++)
+				{
+				    BfPassInstance.BfError bfError = new BfPassInstance.BfError();
+				    passInstance.GetErrorData(errorIdx, bfError, true);
+
+					if (bfError.mIsWarning)
+						mWarningCount++;
+					else
+						mErrorCount++;
+
+					for (int32 moreInfoIdx < bfError.mMoreInfoCount)
+					{
+						BfPassInstance.BfError moreInfo = new BfPassInstance.BfError();
+						passInstance.GetMoreInfoErrorData(errorIdx, moreInfoIdx, moreInfo, true);
+						if (bfError.mMoreInfo == null)
+							bfError.mMoreInfo = new List<BfPassInstance.BfError>();
+						bfError.mMoreInfo.Add(moreInfo);
+					}
+
+				    mErrorList.Add(bfError);
+				}
+
+				mErrorsDirty = true;
+			}
+		}
+
+		public void ClearParserErrors(StringView filePath)
+		{
+
+		}
+
+		void ProcessErrors()
+		{
+			using (mMonitor.Enter())
+			{
+				if (mErrorsDirty)
+				{
+					let root = mErrorLV.GetRoot();
+
+					for (let error in mErrorList)
+					{
+						ErrorsListViewItem item;
+
+						bool changed = false;
+						void SetLabel(ListViewItem item, StringView str)
+						{
+							if (item.Label == str)
+								return;
+							changed = true;
+							item.Label = str;
+						}
+
+						int idx = @error.Index;
+						if (idx >= root.GetChildCount())
+						{
+							item = (.)root.CreateChildItem();
+							item.CreateSubItem(1);
+							item.CreateSubItem(2);
+							item.CreateSubItem(3);
+							item.CreateSubItem(4);
+						}
+						else
+							item = (.)root.GetChildAtIndex(idx);
+
+						if (error.mFilePath == null)
+							DeleteAndNullify!(error.mFilePath);
+						else
+							String.NewOrSet!(item.mFilePath, error.mFilePath);
+						item.mLine = error.mLine;
+						item.mColumn = error.mColumn;
+
+						String codeStr = scope String(32);
+						codeStr.AppendF(error.mIsWarning ? "{}Warning" : "{}Error", Font.EncodeColor(error.mIsWarning ? 0xFFFFFF80 : 0xFFFF8080));
+						if (error.mCode != 0)
+							codeStr.AppendF(" {}", error.mCode);
+						codeStr.AppendF("{}", Font.EncodePopColor());
+						SetLabel(item, codeStr);
+
+						let descItem = item.GetSubItem(1);
+						SetLabel(descItem, scope String(32)..AppendF(error.mError));
+
+						let projectItem = item.GetSubItem(2);
+						SetLabel(projectItem, error.mProject);
+
+						let fileNameItem = item.GetSubItem(3);
+						let fileName = scope String(128);
+						Path.GetFileName(error.mFilePath, fileName);
+						SetLabel(fileNameItem, fileName);
+						let lineNumberItem = item.GetSubItem(4);
+						if (error.mLine != -1)
+							SetLabel(lineNumberItem, scope String(16)..AppendF("{}", error.mLine + 1));
+						else
+							SetLabel(lineNumberItem, "");
+
+						if (changed)
+							item.Focused = false;
+					}
+
+					while (root.GetChildCount() > mErrorList.Count)
+						root.RemoveChildItemAt(root.GetChildCount() - 1);
+
+					mErrorsDirty = false;
+				}
+			}
+		}
+
+		public void CheckResolveAll()
+		{
+			let compiler = gApp.mBfResolveCompiler;
+			if ((mNeedsResolveAll) && (!compiler.IsPerformingBackgroundOperation()))
+			{
+				if (compiler.mResolveAllWait == 0)
+					compiler.QueueDeferredResolveAll();
+				mNeedsResolveAll = false;
+			}
+		}
+
+		public override void Update()
+		{
+			base.Update();
+
+			if (!mVisible)
+			{
+				// Very dirty
+				mDirtyTicks = Math.Max(100, mDirtyTicks);
+				return;
+			}
+
+			let compiler = gApp.mBfResolveCompiler;
+			if ((!compiler.IsPerformingBackgroundOperation()) && (compiler.mResolveAllWait == 0))
+				mDirtyTicks = 0;
+			else
+				mDirtyTicks++;
+
+			ProcessErrors();
+		}
+		
+		public void SetNeedsResolveAll()
+		{
+			mNeedsResolveAll = true;
+		}
+		
+		public void ShowErrorNext()
+		{
+			ProcessErrors();
+
+			bool foundFocused = false;
+			let root = mErrorLV.GetRoot();
+			if (root.mChildItems == null)
+				return;
+			for (let lvItem in root.mChildItems)
+			{
+				if (lvItem.Focused)
+				{
+					lvItem.Focused = false;
+					foundFocused = true;
+				}
+				else if (foundFocused)
+				{
+					lvItem.Focused = true;
+					((ErrorsListViewItem)lvItem).Goto();
+					return;
+				}
+			}
+
+			let lvItem = (ErrorsListViewItem)root.GetChildAtIndex(0);
+			lvItem.Focused = true;
+			lvItem.Goto();
+		}
+	}
+}