Index: tools/sxcat.adb
==================================================================
--- tools/sxcat.adb
+++ tools/sxcat.adb
@@ -383,10 +383,11 @@
             exception
                when Constraint_Error =>
                   Ada.Text_IO.Put_Line
                     (Ada.Text_IO.Current_Error,
                      "Invalid newline encoding """ & Argument & '"');
+                  Handler.Action := Options.Error;
             end;
 
          when Options.No_Quoted =>
             Param.Quoted := SE.Printers.Pretty.No_Quoted;