[EN] RMAN connection error: ORA-28041: Authentication protocol internal error

$ rman target rman/xxx@db1;

Recovery Manager: Release 10.2.0.5.0 - Production on Tue May 27 18:44:36 2014

Copyright (c) 1982, 2007, Oracle.  All rights reserved.

RMAN-00571: ===========================================================

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-00554: initialization of internal recovery manager package failed

RMAN-04005: error from target database: 

ORA-28041: Authentication protocol internal error

We got this error after applying PSU12 to one of our 10.2.0.5 production database. It was on a HP-UX Itanium 64 bit server. We applied the PSU successfully, but later we noticed that it gave some WARNINGs.

Here are the warnings;

[EN] ORA-19706: invalid SCN

ERROR:

During a select through a database link we got the following error;

===> select sysdate from dual@TARGET_DBX
select sysdate from dual@TARGET_DBX
                         *
Error at line 1
ORA-19706: invalid SCN
ORA-02063: önceki line, kaynağı TARGET_DBX Script Terminated on line 1.

Also we noticed the following message in the alert.log;

*********************************************************************************
Rejected the attempt to advance SCN over limit by 8 hours worth to 0x0ca5.1y0772c8, by distributed transaction remote logon, remote DB: TARGET_DBX.WORLD.
 Client info : DB logon user USERX, machine hostx program JDBC Thin Client, and OS user app_usr1 *********************************************************************************