diff --git a/xCAT-server/lib/perl/xCAT/Postage.pm b/xCAT-server/lib/perl/xCAT/Postage.pm
index 6fac85cb1..46c1b93a3 100644
--- a/xCAT-server/lib/perl/xCAT/Postage.pm
+++ b/xCAT-server/lib/perl/xCAT/Postage.pm
@@ -570,6 +570,7 @@ sub makescript {
   # This line only is used to compatible with the old code
   $inc =~ s/#Subroutine:([^:]+)::([^:]+)::([^:]+):([^#]+)#/runsubroutine($1,$2,$3,$4)/eg;
 
+
   # we will create a file in /tftboot/mypostscript/mypostscript_<nodename> 
   if ((!defined($nofiles)) || ($nofiles == 0)) { #
       my $script;
@@ -596,7 +597,25 @@ sub makescript {
       close($script_fp{$node});
     # TODO remove the blank lines
   } 
-     
+      
+  # Check the validity of new generated mypostscirpt
+  # export does not support - in the environment variable name
+  my @invalid_var_name;
+  foreach my $line (split(/\n/, $inc)) {
+      if ($line =~ /export +(.*)/) {
+          my $varname = $1;
+          if ($varname =~ /-/) {
+              push @invalid_var_name, $varname;
+          }
+      }
+  }
+  if (@invalid_var_name) {
+      my $rsp;
+      push @{$rsp->{data}}, "In your configuration, the invalid charactor '-' is used in the following names: " . join(',', @invalid_var_name);
+      xCAT::MsgUtils->message("E", $rsp, $callback);
+      push @::exclude_nodes, $node; 
+  }
+
 } #end foreach node
   
   undef(%::GLOBAL_TAB_HASH);
diff --git a/xCAT-server/lib/xcat/plugins/updatenode.pm b/xCAT-server/lib/xcat/plugins/updatenode.pm
index fdd503bc5..0e0dbe1ae 100644
--- a/xCAT-server/lib/xcat/plugins/updatenode.pm
+++ b/xCAT-server/lib/xcat/plugins/updatenode.pm
@@ -1242,7 +1242,7 @@ sub updatenode
     if (@exclude_nodes > 0) {
        my $rsp = {};
        $rsp->{error}->[0] =
-       "Following nodes will be ignored bacause they are missing some attribute definitions: @exclude_nodes";
+       "Following nodes will be ignored bacause they are missing some attributes or have incorrect configuration: @exclude_nodes";
        $rsp->{errorcode}->[0] =1;
        $callback->($rsp);
     }