diff --git a/xCAT-server/lib/xcat/plugins/aixinstall.pm b/xCAT-server/lib/xcat/plugins/aixinstall.pm
index a71d421f7..6e6571d88 100644
--- a/xCAT-server/lib/xcat/plugins/aixinstall.pm
+++ b/xCAT-server/lib/xcat/plugins/aixinstall.pm
@@ -8629,6 +8629,11 @@ sub doSNcopy2
 		}
     }
 
+    unless(scalar @SNlist)
+    {
+        return;
+    }
+    
 	my $snlist=join(',',@SNlist);
 
 	# copy the /etc/hosts file all the SNs