diff --git a/PROMS/VEPROMS.CSLA.Library/Config/ROFSTLookup.cs b/PROMS/VEPROMS.CSLA.Library/Config/ROFSTLookup.cs
index 0c747804..38bee8dc 100644
--- a/PROMS/VEPROMS.CSLA.Library/Config/ROFSTLookup.cs
+++ b/PROMS/VEPROMS.CSLA.Library/Config/ROFSTLookup.cs
@@ -172,8 +172,8 @@ namespace VEPROMS.CSLA.Library
 							return child.value;
 				}
 			}
-			if (ROID.StartsWith("FFFF")) return string.Format("Invalid Unit RO '{0}'", ROID);
-			return string.Format("Invalid RO '{0}'",ROID);
+			if (ROID.StartsWith("FFFF")) return "?"; // string.Format("Invalid Unit RO '{0}'", ROID);
+			return "?"; // string.Format("Invalid RO '{0}'", ROID);
 		}
 		public rochild GetRoChild12(string ROID16)
 		{