diff --git a/PROMS/DataLoader/Sections.cs b/PROMS/DataLoader/Sections.cs
index 9180a61a..6279f53b 100644
--- a/PROMS/DataLoader/Sections.cs
+++ b/PROMS/DataLoader/Sections.cs
@@ -104,7 +104,7 @@ namespace DataLoader
 				{
 					if (ci == null) ci = new ConfigInfo(null);
 					char cmchar = stpseq.Substring(5, 1)[0];
-					if (cmchar > '2')
+					if (cmchar > '2' || cmchar < '1')
 						ci.AddItem("Section", "ColumnMode", "1");
 					else
 					ci.AddItem("Section", "ColumnMode", stpseq.Substring(5, 1));