Data Protector 9 with Oracle 12c Database give error "12:8019 Integration cannot be configured"

Hi All,

We are configuring the DataProtector 9 to take backups of Oracle Database 12c that is newly installed but ending up with below error

The database reported error while performing requested operation.
Process exit code: 1, Signal: 0
RMAN PID=30451
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of allocate command on DP_TEST channel at 02/16/2017 12:32:15
ORA-19554: error allocating device, device type: SBT_TAPE, device name:
ORA-27000: skgfqsbi: failed to initialize storage subsystem (SBT) layer
Additional information: 7110
ORA-19511: non RMAN, but media manager or vendor specific failure, error text:
SBT error = 7110, errno = 0, sbtinit: internal error - invalid argument(s)
Recovery Manager complete.
[12:2001] The client is not a member of any cell.

Workarounds done so far:

1. Created a soft link in oracle home to point to this particular library

[oracle@server dbhome_1]$ ll | grep libobk
lrwxrwxrwx 1 oracle dba 36 Feb 15 16:29 libobk -> /opt/omni/lib/

2. Also created the soft link within the Oracle home lib folder

[oracle@tproddb lib]$ pwd
[oracle@serverlib]$ ll | grep libobk
lrwxrwxrwx 1 oracle dba 36 Feb 16 07:30 libobk -> /opt/omni/lib/
[oracle@server lib]$

3. Included this lib path in export LD_LIBRARY_PATH

4. Granted full permissions to folder /opt/omni

5. Tried multiple times, removing and importing the client from cell manager

Still there is no luck and ending up with the above error
However, the file system backups preview executes successfully, issue remains with Oracle backups

Environment details are as below
HP Cell Manager : This is Data protector version 9 running on Windows Server 2008 R2
Client System : Database server running on RHEL 7 64 bit
Oracle Database : Oracle database is Oracle 12c Enterprise Edition, (Running in archivelog mode)

Please help in resolving this issue