RUN {

ALLOCATE CHANNEL c1 DEVICE TYPE DISK MAXPIECESIZE 500M;
BACKUP AS COMPRESSED BACKUPSET FULL DATABASE TAG "FULL_DATABASE_DATAFILES" FORMAT '/u/backup/crbnk/rman/DATAFILE/bkp_%D_%T_%s_%p_DATA';

SQL "ALTER SYSTEM ARCHIVE LOG CURRENT";

BACKUP ARCHIVELOG ALL FORMAT '/u/backup/crbnk/rman/ARCHIVELOG/bkp_%D_%T_%s_%p_ARCHIVELOG' TAG "FULL_DATABASE_ARCHIVELOGS" DELETE INPUT;

BACKUP SPFILE FORMAT '/u/backup/crbnk/rman/PARAMETERFILE/bkp_%D_%T_%s_%p_PARAM' TAG "FULL_DATABASE_SPFILE";

BACKUP CURRENT CONTROLFILE FORMAT '/u/backup/crbnk/rman/CONTROLFILE/bkp_%D_%T_%s_%p_CONTROL' TAG "FULL_DATABASE_CONTROLFILE";

SQL "ALTER DATABASE BACKUP CONTROLFILE TO TRACE as ''/u/backup/crbnk/rman/CONTROLFILE/control_file.sql''";

DELETE OBSOLETE;

RELEASE CHANNEL c1;
}

RMAN> show all;

using target database control file instead of recovery catalog
RMAN configuration parameters for database with db_unique_name CRBNK are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1;
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED;
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/u/app/oracle/product/11.2.0/dbs/snapcf_crbnk.f'; # default

RMAN-03090: Starting Control File and SPFILE Autobackup at 01-MAR-20
RMAN-08503: piece handle=/u/app/oracle/fast_recovery_area/CRBNK/autobackup/2020_03_01/o1_mf_s_1033946521_h5qfqsd3_.bkp comment=NONE
RMAN-03091: Finished Control File and SPFILE Autobackup at 01-MAR-20

RMAN-06162: sql statement: ALTER DATABASE BACKUP CONTROLFILE TO TRACE as ''/u/backup/crbnk/rman/CONTROLFILE/control_file.sql''
RMAN-08031: released channel: c1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of sql command on default channel at 03/01/2020 23:22:02
RMAN-11003: failure during parse/execution of SQL statement: ALTER DATABASE BACKUP CONTROLFILE TO TRACE as '/u/backup/crbnk/rman/CONTROLFILE/control_file.sql'
ORA-01277: file '/u/backup/crbnk/rman/CONTROLFILE/control_file.sql' already exists

Recovery Manager complete.
20-03-01 23:22:02 End RMAN full backup crbnk