diff --git a/perl-xCAT/xCAT/Utils.pm b/perl-xCAT/xCAT/Utils.pm
index c8102b460..9338c8114 100644
--- a/perl-xCAT/xCAT/Utils.pm
+++ b/perl-xCAT/xCAT/Utils.pm
@@ -899,7 +899,7 @@ sub runcmd3 { #a proper runcmd that indpendently returns stdout, stderr, pid and
     my $cmdout;
     my $cmderr = gensym;
     my $cmdpid = open3($cmdin,$cmdout,$cmderr,@cmd);
-    my $cmdsel = IO::Select->new($cmdout,$cmdin);
+    my $cmdsel = IO::Select->new($cmdout,$cmderr);
     foreach (@indata) {
         print $cmdin $_;
     }
diff --git a/xCAT-server/lib/perl/xCAT/ADUtils.pm b/xCAT-server/lib/perl/xCAT/ADUtils.pm
index 957a2ef10..5cfcc8fd1 100644
--- a/xCAT-server/lib/perl/xCAT/ADUtils.pm
+++ b/xCAT-server/lib/perl/xCAT/ADUtils.pm
@@ -460,7 +460,7 @@ sub add_user_account {
     my $rc = $retdata->{exitcode};
     if ($rc == 0) {
         return {error=>"User already exists"};
-    } elsif (not $rc==8192) {
+    } elsif (not $rc==32) {
         return {error=>"Unknown error $rc:".$retdata->{errors}};
     }
     $retdata = runcmd3(input=>$ldif,command=>["ldapmodify","-H","ldaps://$directoryserver"]); 
@@ -520,7 +520,7 @@ sub add_host_account {
         } else {
             return {error=>"System already exists"};
         }
-    } elsif (not $rc==8192) {
+    } elsif (not $rc==32) {
         return {error=>"Unknown error $rc: ".$retdata->{errors}};
     } else {
         $ldif = $machineldiftemplate;