Index: trunk/ippScripts/scripts/stack_skycell.pl
===================================================================
--- trunk/ippScripts/scripts/stack_skycell.pl	(revision 23295)
+++ trunk/ippScripts/scripts/stack_skycell.pl	(revision 23380)
@@ -203,5 +203,5 @@
 # Perform stacking
 unless ($no_op) {
-    my $command = "$ppStack $listName $outroot";
+    my $command = "$ppStack -input $listName $outroot";
     $command .= " -stats $outputStats" if $do_stats;;
     $command .= " -recipe PPSTACK $recipe_ppStack";