diff --git a/PROMS/DataLoader/DocVersions.cs b/PROMS/DataLoader/DocVersions.cs
index 36737338..38616fb3 100644
--- a/PROMS/DataLoader/DocVersions.cs
+++ b/PROMS/DataLoader/DocVersions.cs
@@ -31,6 +31,9 @@ namespace DataLoader
 		}
 
 		private OutsideTransition _OutTran;
+		public int MultiUnitCount = 0;
+		public Dictionary<int, int> Old2NewApple;
+		public Dictionary<int, int> New2OldApple;
 
 		public TimeSpan MigrateDocVersion(DocVersion docver, bool convertProcedures)
 		{
@@ -38,6 +41,19 @@ namespace DataLoader
 			string pth = docver.Title;
 			// if the Title is empty, return because this docversion has already been migrated.
 			if (pth == null || pth == "") return TimeSpan.FromTicks(lTime);
+			MultiUnitCount = docver.DocVersionConfig.Unit_Count;
+			if (MultiUnitCount > 0)
+			{
+				Old2NewApple = new Dictionary<int, int>();
+				New2OldApple = new Dictionary<int, int>();
+				for (int i = 1; i <= MultiUnitCount; i++)
+				{
+					docver.DocVersionConfig.SelectedSlave = i;
+					int oldindex = int.Parse(docver.DocVersionConfig.Old_Index);
+					Old2NewApple.Add(oldindex, i);
+					New2OldApple.Add(i, oldindex);
+				}
+			}
 			if (!File.Exists(pth + @"\set.dbf") || !File.Exists(pth + @"\curset.dat")) return new TimeSpan();			// Open connection
 			OleDbConnection cn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pth + ";Extended Properties=dBase III;Persist Security Info=False");
 			if (convertProcedures)
@@ -46,10 +62,10 @@ namespace DataLoader
 				//                   The INF files contain a path to a corresponding NDX file - had data with bat NDX path
 				DeleteINFFiles(pth);
 				_OutTran = new OutsideTransition(cn);
-				frmMain.AddInfo("Before MigrateROFST {0}\r\n{1}", GC.GetTotalMemory(true), VEPROMS.CSLA.Library.CSLACache.UsageAll);
+				frmMain.AddInfo("Before MigrateROFST{0}\r\n{1}", GC.GetTotalMemory(true), VEPROMS.CSLA.Library.CSLACache.UsageAll);
 				MigrateROFST(pth, docver);
 				GC.Collect();
-				frmMain.AddInfo("After MigrateROFST {0}\r\n{1}", GC.GetTotalMemory(true), VEPROMS.CSLA.Library.CSLACache.UsageAll);
+				frmMain.AddInfo("After MigrateROFST{0}\r\n{1}", GC.GetTotalMemory(true), VEPROMS.CSLA.Library.CSLACache.UsageAll);
 				// Migrate library documents
 				MigrateLibDocs(cn, pth);
 				// Initialize Dictionaries