Index: /trunk/PS-IPP-PStamp/lib/PS/IPP/PStamp/Job.pm
===================================================================
--- /trunk/PS-IPP-PStamp/lib/PS/IPP/PStamp/Job.pm	(revision 36129)
+++ /trunk/PS-IPP-PStamp/lib/PS/IPP/PStamp/Job.pm	(revision 36130)
@@ -808,5 +808,5 @@
                         $command .= " -priority_order";
                     }
-                    $command .= " -surveyName $survey";
+                    $command .= " -surveyName $survey" if $survey;
                 } else {
                     $command = "$stacktool -dbname $imagedb";