Got 'database incarnation not set' while using RMAN with catalog

RMAN> run {
2> allocate channel oem_backup_sbt1 type 'SBT_TAPE' format '%d_%U' parms "ENV=(NB_ORA_POLICY=oracle_rman, NB_ORA_SCHED=Default)";
3> backup as BACKUPSET tag 'BACKUP_REVQAS1_121814161014' recovery files;
4> release channel oem_backup_sbt1;
5> }
new incarnation of database registered in recovery catalog
starting full resync of recovery catalog
full resync complete
allocated channel: oem_backup_sbt1
channel oem_backup_sbt1: SID=162 device type=SBT_TAPE
channel oem_backup_sbt1: Veritas NetBackup for Oracle - Release 6.5 (2009050106)

Starting backup at 2014-12-18 16:11:33
released channel: oem_backup_sbt1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 12/18/2014 16:11:33
RMAN-03014: implicit resync of recovery catalog failed
RMAN-06004: ORACLE error from recovery catalog database: RMAN-20020: database incarnation not set


RMAN> exit;

Recovery Manager complete.

select * from dual;