diff --git a/PROMS/Volian.Controls.Library/StepRTB.cs b/PROMS/Volian.Controls.Library/StepRTB.cs
index 51b0525a..a234f432 100644
--- a/PROMS/Volian.Controls.Library/StepRTB.cs
+++ b/PROMS/Volian.Controls.Library/StepRTB.cs
@@ -2517,6 +2517,7 @@ namespace Volian.Controls.Library
 			if (SelectionStack.Count == 0)
 				_SelectionStack = null;
 			Select(selection.SelectionStart, selection.SelectionLength);
+			selection = null;
 		}
 		public class SelectionData
 		{
@@ -2572,6 +2573,7 @@ namespace Volian.Controls.Library
 		}
 		private void FindLinks()
 		{
+			//int oldRegexCacheSize = Regex.CacheSize;
 			string str = Text;
 			_LinkLocations = new List<LinkLocation>();
 			MatchCollection matches = Regex.Matches(str, @"<START](.*?)[[]END>", RegexOptions.Singleline);
@@ -2586,6 +2588,9 @@ namespace Volian.Controls.Library
 					match.Value, matchrtf.Index, matchrtf.Length, thisLink);
 				_LinkLocations.Add(thisLink);
 			}
+			//Regex.CacheSize = 0;
+			GC.Collect(); // there is a memory leak in Regex this fixes it.
+			//Regex.CacheSize = oldRegexCacheSize;
 		}
 		private LinkLocation FindBetweenLinks()
 		{