archivelogdeletion

why my archivelog deletion is not happening.

[oracle@dbadm ~]$ rman target /

Recovery Manager: Release 12.1.0.2.0 - Production on Sat Jan 30 14:58:30 2016

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connected to target database: DDD (DBID=3695488924)

RMAN> DELETE ARCHIVELOG ALL COMPLETED BEFORE 'sysdate-30';

using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=215 instance=DDD device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=1191 instance=DDD device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=1489 instance=DDD device type=DISK
allocated channel: ORA_DISK_4
channel ORA_DISK_4: SID=6 instance=DDD device type=DISK
allocated channel: ORA_DISK_5
channel ORA_DISK_5: SID=205 instance=DDDD device type=DISK
allocated channel: ORA_DISK_6
channel ORA_DISK_6: SID=303 instance=DDD device type=DISK
allocated channel: ORA_DISK_7
channel ORA_DISK_7: SID=1099 instance=DDD device type=DISK
allocated channel: ORA_DISK_8
channel ORA_DISK_8: SID=1196 instance=DDD device type=DISK
specification does not match any archived log in the repository

RMAN>