ORA-06553: PLS-553

RMAN recovery fails:

RMAN-03002: failure of recover command at
ORA-06552: PL/SQL: Compilation unit analysis terminated
ORA-06553: PLS-553: character set name is not recognized

Solution:

export NLS_LANG=AMERICAN_AMERICA.AL32UTF8

Restarted database with above characterset.

Start Recovery.