R12 Concurrent Program Trace enable

Hi,

I am trying to enable a trace file for one of my custom concurrent program executable is RDF.

But its not generating any file in user_dump_dest dir.

Also when I run the below query, it's not giving any Trace ID and trace file name is showing oratstb_ora_.trc?

SELECT 'Request id: '||request_id ,
'Trace id: '||oracle_Process_id,
'Trace Flag: '||req.enable_trace,
'Trace Name:
'||dest.value||'/'||lower(dbnm.value)||'_ora_'||oracle_process_id||'.trc',
'Prog. Name: '||prog.user_concurrent_program_name,
'File Name: '||execname.execution_file_name|| execname.subroutine_name ,