Error RMAN-10003 ORA-01005:
% rman target /
Recovery Manager: Release 11.2.0.3.0 - Production on Sun Aug 09 09:03:51 2015
...
connected to target database: ORCL (DBID=1234567890)
RMAN> delete obsolete;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of crosscheck command at 08/09/2015 09:03:52
RMAN-12001: could not open channel ORA_DISK_1
RMAN-10008: could not create channel context
RMAN-10003: unable to connect to target database
ORA-01005: null password given; logon denied
Solution:
RMAN> CONFIGURE CHANNEL 1 DEVICE TYPE DISK CLEAR;