diff --git a/PROMS/ReferencedObjects/Exe/RefObj/ROEditor/ROEditor.cs b/PROMS/ReferencedObjects/Exe/RefObj/ROEditor/ROEditor.cs
index 8bc2bc5f..43361914 100644
--- a/PROMS/ReferencedObjects/Exe/RefObj/ROEditor/ROEditor.cs
+++ b/PROMS/ReferencedObjects/Exe/RefObj/ROEditor/ROEditor.cs
@@ -1556,10 +1556,25 @@ namespace ROEditor
 
 			if  (StartupROEditor)
 			{
-				// open an existing file, or create a new one
+				// The ROEditor.OWN file assures that only one individual at a time can edit the RO database.  
+				// The file is opened and kept open while the user is editing the database.  The contents of the
+				// file will identify the current user and state when the edit session began.
 				try 
 				{
 					fiown = new FileInfo("RoEditor.own");
+					try {
+						// Try to delete the owner file.  If another process has the file open, this delete will fail.
+						// If the file is closed, it will be deleted, and the user will be placed in the editor.  The users
+						// name and the time when this session began will be placed in the owner file.
+						fiown.Delete(); 
+					}
+					catch(Exception ex)
+					{
+						fsown = fiown.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
+						TextReader tr1 = new StreamReader(fsown);
+						string who1 = tr1.ReadToEnd();
+						MessageBox.Show(ex.Message + "\r\n\r\n" + who1, "RO Editor In Use", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
+					}
 					fsown = fiown.Open(FileMode.OpenOrCreate, FileAccess.Read, FileShare.ReadWrite);
 					TextReader tr = new StreamReader(fsown);
 					string who = tr.ReadToEnd();