diff --git a/PROMS/VEPROMS.CSLA.Library/Extension/ItemInsertExt.cs b/PROMS/VEPROMS.CSLA.Library/Extension/ItemInsertExt.cs
index 74d8d7a1..ca2f25ed 100644
--- a/PROMS/VEPROMS.CSLA.Library/Extension/ItemInsertExt.cs
+++ b/PROMS/VEPROMS.CSLA.Library/Extension/ItemInsertExt.cs
@@ -2334,7 +2334,7 @@ namespace VEPROMS.CSLA.Library
 				ItemInfo.DeleteItemInfoAndChildren(item.ItemID); // Dispose ItemInfo and Children
 				if (prevItem != null)		
 					prevItem.UpdateTransitionText();
-				else
+				else if (nextItem != null) // B2020-050 needed check for null nextItem - found when deleting empty equation sub-step
 					nextItem.ResetOrdinal();	// B2020-043: Fix transition text, code moved from above, so that DeleteItemInfoAndChildren is called first.
 					
 			}