diff --git a/PROMS/VEPROMS User Interface/dlgExportImport.cs b/PROMS/VEPROMS User Interface/dlgExportImport.cs
index 676c0f5d..5e3c2215 100644
--- a/PROMS/VEPROMS User Interface/dlgExportImport.cs	
+++ b/PROMS/VEPROMS User Interface/dlgExportImport.cs	
@@ -436,7 +436,13 @@ namespace VEPROMS
 					DialogResult dr = MessageBox.Show(this, msg, "Overwrite Existing Procedure", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Stop);
 					if (dr == DialogResult.Yes)
 					{
-						ImportProcedureOverwrite(xd, pi);
+						bool success = ImportProcedureOverwrite(xd, pi);		// C2018-020: check for successful Import
+						if (!success)
+						{
+							canceledPressed = true;
+							resolvedProcNum = false;
+							break;
+						}
 						isImported = true;
 						break;
 					}
@@ -549,7 +555,7 @@ namespace VEPROMS
 			FixFloatingFoldouts();
       File.Delete(fn);
     }
-    private void ImportProcedureOverwrite(XmlDocument xd, ProcedureInfo pi)
+    private bool ImportProcedureOverwrite(XmlDocument xd, ProcedureInfo pi)
     {
 			floatFoldout = new Dictionary<int, int>();
 			oldFormat = new Dictionary<int, string>();
@@ -581,16 +587,30 @@ namespace VEPROMS
 			}
 			catch(Exception ex)
 			{
-				ExternalTransitionItem = pi.HandleSqlExceptionOnDelete(ex);
+				// C2018-020: cannot overwrite the procedure because transitions point to this.  Show dialog listing transitions and then
+				//   return false to flag that import was not successful.
+				if (ex.Message.Contains("has External Transitions"))
+				{
+					using (TransitionInfoList exTrans = TransitionInfoList.GetExternalTransitionsToChildren(pi.ItemID))
+					{
+						DialogResult ans = MessageBox.Show("Transitions exist to this procedure and cannot be adjusted automatically." +
+							"\r\nSteps with Problem Transitions:" +
+							exTrans.Summarize(),
+							"Cannot Overwrite procedure", MessageBoxButtons.OK, MessageBoxIcon.Question);
+					}
+				}
+				else 
+					MessageBox.Show(ex.Message, "SQL Exception", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
 				File.Delete(fn);
 				TurnChangeManagerOff.Execute(); // Assure that the Change Manager is off
-				return;
+				return false;
 			}
       //add imported procedure
       _MyNewProcedure = AddProcedure(xd.DocumentElement, MyDocVersion, lastProcedure);
       //update transitions
       AddTransitions(PendingTransitions);
 			FixFloatingFoldouts();
+			return true;
     }
 		private void LoadImportDataDocument()
 		{