How can I delete old back-ups SAP/Oralce from TSM?

Hi all,

How can I set an expiration date for old back-ups so that they are deleted when reached that date? For our R/3 Enterprise 4.7 on Oracle 9.2.0.7 / AIX 5.2 we use TSM & Backint.

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BR0278I Command output of '/usr/sap/<SID>/SYS/exe/run/backint

Data Protection for mySAP.com(R) technology

Interface between SAPDBA Utilities and Tivoli Storage Manager

- Version 3, Release 3, Modification 1 for AIX LF 64-bit -

Build: 196 compiled on Feb 24 2003

(c) Copyright IBM Corporation, 1996, 2003, All Rights Reserved.

BKI2027I: Using TSM-API version 5.2.2.0 (compiled with 4.2.3.0).

BKI2000I: Successfully connected to PROLE on port tdpr3ora64.

BKI0005I: Start of program at: Fri Mar 23 20:01:45 2007