Index: trunk/ippScripts/scripts/stack_skycell.pl
===================================================================
--- trunk/ippScripts/scripts/stack_skycell.pl	(revision 19689)
+++ trunk/ippScripts/scripts/stack_skycell.pl	(revision 19932)
@@ -10,4 +10,7 @@
 print "\n\n";
 print "Starting script $0 on $host\n\n";
+
+use DateTime;
+my $mjd_start = DateTime->now->mjd;   # MJD of starting script
 
 use vars qw( $VERSION );
@@ -264,4 +267,5 @@
             $command .= " -uri $outputName -path_base $outroot";
             $command .= " -hostname $host" if defined $host;
+            $command .= (" -dtime_script " . (($mjd_start - DateTime->now->mjd) * 86400));
         } else {
             $mode = "-updaterun -state full";
@@ -294,4 +298,5 @@
             $command .= " -addsumskyfile";
             $command .= " -hostname $host" if defined $host;
+            $command .= (" -dtime_script " . (($mjd_start - DateTime->now->mjd) * 86400));
         } else {
             $command .= " -updatesumskyfile";