diff --git a/PROMS/Volian.Controls.Library/dlgEnhMissingItem.cs b/PROMS/Volian.Controls.Library/dlgEnhMissingItem.cs
index 811bf6d9..f7be0ed8 100644
--- a/PROMS/Volian.Controls.Library/dlgEnhMissingItem.cs
+++ b/PROMS/Volian.Controls.Library/dlgEnhMissingItem.cs
@@ -90,6 +90,7 @@ namespace Volian.Controls.Library
 			if (_SourceItem.IsProcedure)
 			{
 				ItemInfo ii = cbUnlinkedEnhancedItems.SelectedItem as ItemInfo;
+				if (ii == null) return;
 				ContentInfoList cil = ContentInfoList.Get16BitEnhancedContents(_SourceItem.ItemID, ii.ItemID, _EnhType);
 				bool foundSubItem = false;	// in returned list, see if there are any sections/steps.  If none, don't prompt
 				foreach (ContentInfo ci in cil)