RMAN delete expired backup questions

Getting this … I am running an RMAN command to delete expired backups,  but looking at the error it may not let me do this via TDP.  Can’t be sure, never saw this one.  If necessary,  I will open a ticket with Oracle.

 

ORA-19509: failed to delete sequential file, handle="0cnoi586_1_1", parms=""

 

This is using IBM's TDP for Oracle media manager.  IS this the proper method to clean up backups made from RMAN in RMAN's catalog. 

 

run {

allocate channel t1 type 'sbt_tape' parms

'ENV=(tdpo_optfile=/usr/tivoli/tsm/client/api/bin64/dsm.opt)';

delete noprompt expired backup;