diff --git a/PROMS/VEPROMS User Interface/frmVEPROMS.cs b/PROMS/VEPROMS User Interface/frmVEPROMS.cs
index 137113f5..0695bd4c 100644
--- a/PROMS/VEPROMS User Interface/frmVEPROMS.cs	
+++ b/PROMS/VEPROMS User Interface/frmVEPROMS.cs	
@@ -96,7 +96,14 @@ namespace VEPROMS
 			get
 			{
 				if (_SelectedROFst == null && SelectedDVI != null)
+				{
+					if (SelectedDVI.DocVersionAssociationCount <= 0)
+					{
+						MessageBox.Show("There is no Referenced Object (RO) data for this procedure set. Use the Properties for the set to define the RO data.");
+						return null;
+					}
 					_SelectedROFst = SelectedDVI.DocVersionAssociations[0].MyROFst;
+				}
 				return _SelectedROFst;
 			}
 			set { _SelectedROFst = value; }