diff --git a/PROMS/Volian.Controls.Library/StepTabPanel.designer.cs b/PROMS/Volian.Controls.Library/StepTabPanel.designer.cs
index 64545d37..682995a0 100644
--- a/PROMS/Volian.Controls.Library/StepTabPanel.designer.cs
+++ b/PROMS/Volian.Controls.Library/StepTabPanel.designer.cs
@@ -13,6 +13,10 @@ namespace Volian.Controls.Library
 		/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
 		protected override void Dispose(bool disposing)
 		{
+			// when a StepTabPanel is Disposed, if it was associated with the SelectedDisplayTabItem, set the SelectedDisplayTabItem to null
+			// this was causing an error where a deleted Procedure was being referenced, since it was the last SelectedDisplayTabItem
+			if (MyDisplayTabControl.SelectedDisplayTabItem != null && MyDisplayTabControl.SelectedDisplayTabItem.MyStepTabPanel == this)
+				MyDisplayTabControl.SelectedDisplayTabItem = null;
 			if (disposing && (components != null))
 			{
 				components.Dispose();