hi,
Check sofllink
spXXXprd01[RDMZ1]-/u01/app/oracle/product/12.1.0
> cd lib
>umask 000 (changed permitions)
> ll | grep libobk (check if you have soflink)
> ln -s /opt/omni/lib/libob2oracle8_64bit.so libobk.so (created soflink)
>ll | grep libobk
lrwxr-xr-x 1 oracle oinstall 36 Feb 29 15:27 libobk.so -> /opt/omni/lib/libob2oracle8_64bit.so
Do it in both server if you have a cluster.