diff --git a/xCAT-server/lib/xcat/plugins/conserver.pm b/xCAT-server/lib/xcat/plugins/conserver.pm
index 59089468c..a42bb2177 100644
--- a/xCAT-server/lib/xcat/plugins/conserver.pm
+++ b/xCAT-server/lib/xcat/plugins/conserver.pm
@@ -73,12 +73,18 @@ sub preprocess_request {
   }
   if ($::LOCAL) {
     if ($noderange && @$noderange>0) {
-      $callback->({data=>"Invalide option -l or --local when there are nodes specofied."});
+      $callback->({data=>"Invalide option -l or --local when there are nodes specified."});
       $request = {};
       return;
     }
   }
-
+  
+  if(exists($ARGV[0])){
+    $callback->({data=>"Invalide option $ARGV[0] specified."});
+    $request = {};
+    return;
+  }
+  
   # get site master
   my $master=xCAT::Utils->get_site_Master();
   if (!$master) { $master=hostname(); }