Index: trunk/pstamp/scripts/pstamp_finish.pl
===================================================================
--- trunk/pstamp/scripts/pstamp_finish.pl	(revision 25196)
+++ trunk/pstamp/scripts/pstamp_finish.pl	(revision 25317)
@@ -68,4 +68,7 @@
 }
 
+if ($product eq "NULL") {
+    stop_request_and_exit($req_id, $PS_EXIT_PROG_ERROR);
+}
 
 my $outputDataStoreRoot = metadataLookupStr($ipprc->{_siteConfig}, 'DATA_STORE_ROOT');