Index: trunk/ippScripts/scripts/automate_stacks.pl
===================================================================
--- trunk/ippScripts/scripts/automate_stacks.pl	(revision 29698)
+++ trunk/ippScripts/scripts/automate_stacks.pl	(revision 29700)
@@ -79,6 +79,6 @@
     'check_dqstats'        => \$check_dqstats,
     'queue_dqstats'        => \$queue_dqstats,
-    'check_diffs'          => \$check_diffs,
-    'queue_diffs'          => \$queue_diffs,
+    'check_diffs'          => \$check_stacks,
+    'queue_diffs'          => \$queue_stacks,
     'clean_old'            => \$clean_old,
     ) or pod2usage ( 2 );
@@ -1207,4 +1207,10 @@
 		    next;
 		}
+		if ($Nexposures == 0) {
+		    if ($debug == 1) {
+			print STDERR "execute_stacks: Target $target in filter $filter on $date has no exposures.\n";
+		    }
+                    next;
+		}		    
 		else {
 		    do_extra_processing($date,$target,$filter,$pretend);