Error while running SAP R/3 db backup

Hi, We have SAP db backup running on DP 6.2.

Client OS is HP-UX 11.31, CM OS is windows 2003 enterprise edition.

The backup gets completed with 100% success but when we check session message it shows below error.

[Critical] From: OB2BAR_OMNISAP@abc.corp.xyz.com "OMNISAP" Time: 03/06/16 20:03:22

Failed to execute 'connect %s as sysdba;

[Major] From: OB2BAR_OMNISAP@abc.corp.xyz.com "OMNISAP" Time: 03/06/16 20:03:22

Oracle control file backup failed.

Please help me to know this error is from DP side or SAP db side also let me know the solution for this.

Thanks in advance