12c - Operation 227 succeeded.

C:\Users\oracle12c>sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Mon Apr 27 18:59:36 2015

Copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing opt
ions

SQL>
SQL>
SQL>
SQL> select name, open_mode from v$pdbs;

NAME                           OPEN_MODE
------------------------------ ----------
PDB$SEED                       READ ONLY
PDB1                           MOUNTED
PDB2                           MOUNTED
PDB3                           MOUNTED

SQL> alter pluggable database all open;

Operation 227 succeeded.

SQL> alter pluggable database pdb1 save state;

Operation 227 succeeded.

SQL> alter pluggable database pdb3 close;

Operation 227 succeeded.

This issue is generated by the client I used (11.2.0.4) to connect to database (12.1.0.2)