Index: trunk/tools/rundiffskycell.pl
===================================================================
--- trunk/tools/rundiffskycell.pl	(revision 29163)
+++ trunk/tools/rundiffskycell.pl	(revision 29176)
@@ -39,5 +39,5 @@
 
 pod2usage( -msg => "Unknown option: @ARGV", -exitval => 2 ) if @ARGV;
-pod2usage( -msg => "-diff_id and -skycell_id are required", -exitval => 2 )
+pod2usage( -msg => "--diff_id and --skycell_id are required", -exitval => 2 )
     if !$diff_id or !$skycell_id;