Index: trunk/ippScripts/scripts/stack_skycell.pl
===================================================================
--- trunk/ippScripts/scripts/stack_skycell.pl	(revision 12800)
+++ trunk/ippScripts/scripts/stack_skycell.pl	(revision 13119)
@@ -83,8 +83,15 @@
 my $inputList;			# List of input files
 my $skycell_id;			# Skycell identifier
+my $tess_id;			# Tesselation identifier
 my $camera;			# Camera
 foreach my $file (@$files) {
     my $uri = $ipprc->convert_filename_absolute( $file->{uri} ); # URI for file
     $inputList .= "$uri ";
+    if (defined $tess_id) {
+	&my_die("Tesselation identifiers don't match", $diff_id, $PS_EXIT_SYS_ERROR) unless
+	    $file->{tess_id} eq $tess_id;
+    } else {
+	$tess_id = $file->{tess_id};
+    }
     if (defined $skycell_id) {
 	&my_die("Skycell identifiers don't match", $stack_id, $PS_EXIT_SYS_ERROR) unless