diff --git a/PROMS/VEPROMS.CSLA.Library/Extension/TransitionExt.cs b/PROMS/VEPROMS.CSLA.Library/Extension/TransitionExt.cs
index 1e297f88..ead3b745 100644
--- a/PROMS/VEPROMS.CSLA.Library/Extension/TransitionExt.cs
+++ b/PROMS/VEPROMS.CSLA.Library/Extension/TransitionExt.cs
@@ -892,9 +892,12 @@ namespace VEPROMS.CSLA.Library
 			tb.AppendPrefix();
 			bool usedRangeAncestor = false;
 			ItemInfo next = GetNextItem(tb._ToItem, rangeAncestors, ref usedRangeAncestor);
+			string lastTab = Tab(tb._RangeItem, tb._RangeItem.ActiveFormat.PlantFormat.FormatData.TransData.TStepNoFlag);
 			while (next.ItemID != tb._RangeItem.ItemID)
 			{
-				tb.ReplaceToken(", " + Tab(next, tb._RangeItem.ActiveFormat.PlantFormat.FormatData.TransData.TStepNoFlag));
+				string thisTab = Tab(next, tb._RangeItem.ActiveFormat.PlantFormat.FormatData.TransData.TStepNoFlag);
+				if (lastTab == thisTab) break;
+				tb.ReplaceToken(", " + thisTab);
 				next = GetNextItem(next, rangeAncestors, ref usedRangeAncestor);
 			}
 			tb._UsedRangeAncestor = usedRangeAncestor;