Bperror command

Hello Experts,

I need the error codes responding to the backup policy. But unable to get it, If i run the below command it gives me successfull clients name and failed clients but not the policy name. So pls help with the correct syntax. 

C:\Program Files\Veritas\NetBackup\bin\admincmd>bperror -d 02/27/2015 09:00:00 -
e 02/28/2015 12:15:00 -t backstat -by_statcode -U >e:/error

2 reports needed.

1:- error codes during a time periord with policy name. 

2:- Successfull policy and error codes w.r.t policies during a time period.