diff --git a/PROMS/DataLoader/Transitions.cs b/PROMS/DataLoader/Transitions.cs
index df6b045d..c683103b 100644
--- a/PROMS/DataLoader/Transitions.cs
+++ b/PROMS/DataLoader/Transitions.cs
@@ -355,17 +355,19 @@ namespace DataLoader
 							break;
 						}
 					}
-
-					// For each transition that points to the A0, make it point to the proc.
-					// First, find all of them by getting transitions with the A0 (dummy
-					// transition record).  Then update the to or range id in the transition
-					// record & then update the content/from part.
-					List<int> transToChg = new List<int>();
-					List<int> transRgChg = new List<int>();
-					TransitionInfoList til = TransitionInfoList.GetByToID(item.ItemID);
-					foreach (TransitionInfo ti in til) UpdateTranDataForA0(prc, ti.TransitionID, false);
-					til = TransitionInfoList.GetByRangeID(item.ItemID);
-					foreach (TransitionInfo tir in til) UpdateTranDataForA0(prc, tir.TransitionID, true);
+					if (prc != null)
+					{
+						// For each transition that points to the A0, make it point to the proc.
+						// First, find all of them by getting transitions with the A0 (dummy
+						// transition record).  Then update the to or range id in the transition
+						// record & then update the content/from part.
+						List<int> transToChg = new List<int>();
+						List<int> transRgChg = new List<int>();
+						TransitionInfoList til = TransitionInfoList.GetByToID(item.ItemID);
+						foreach (TransitionInfo ti in til) UpdateTranDataForA0(prc, ti.TransitionID, false);
+						til = TransitionInfoList.GetByRangeID(item.ItemID);
+						foreach (TransitionInfo tir in til) UpdateTranDataForA0(prc, tir.TransitionID, true);
+					}
 				}
 			}
 			foreach (string str in RemoveFromDicTrans)