ORA-28575: unable to open RPC connection to external procedure agent

Hi

Getting below error after upgrading database to 11.2.0.3.6 from 10.2.0.4

SQL> exec syscall('ls');
BEGIN syscall('ls'); END;

*
ERROR at line 1:
ORA-28575: unable to open RPC connection to external procedure agent
ORA-06512: at "MDS_OWN.SYSCALL", line 1
ORA-06512: at line 1


Below is the status of the listener

mdscmdev:/eas/home/oracle $ lsnrctl status MDSD

LSNRCTL for Solaris: Version 11.2.0.3.0 - Production on 09-JUL-2013 00:41:57

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROCMDSD))
STATUS of the LISTENER
------------------------
Alias                     MDSD
Version                   TNSLSNR for Solaris: Version 11.2.0.3.0 - Production
Start Date                08-JUL-2013 04:22:02
Uptime                    0 days 20 hr. 19 min. 55 sec
Trace Level               off
Security                  ON: Local OS Authentication