Index: trunk/ippScripts/scripts/stack_skycell.pl
===================================================================
--- trunk/ippScripts/scripts/stack_skycell.pl	(revision 12218)
+++ trunk/ippScripts/scripts/stack_skycell.pl	(revision 12421)
@@ -107,14 +107,13 @@
 if (defined $workdir) {
     $workdir = $ipprc->convert_filename_absolute( $workdir );
+    $workdir = File::Spec->catdir( $workdir, "tess_" . $tess_id, "sky_" . $skycell_id );
 } else {
     my ($vol, $dir, $file) = File::Spec->splitpath( $ipprc->convert_filename_absolute( $$files[0]->{uri} ) );
     $workdir = $dir;
 }
-
-$workdir = File::Spec->catfile( $workdir, "sky$skycell_id" );
 system "mkdir -p $workdir" unless -d $workdir;
 
 # Get the output filenames
-my $outputFile = "sky$skycell_id.stk$stack_id"; # Root name
+my $outputFile = "$tess_id.$skycell_id.stk$stack_id"; # Root name
 my $outputRoot = File::Spec->catfile( $workdir, $outputFile );