If you uninstalled Oracle 10g, proceed to stop VCS. Otherwise, unlink the Veritas libraries.
To unlink the Veritas libraries
/usr/lib/hpux64/libvcsmm.1 => /usr/lib/hpux64/libvcsmm.1
/usr/lib/hpux64/liblltdb.so.1 => /usr/lib/hpux64/liblltdb.so.1
You might have to redo the unlinking task to configure the Oracle single-instance binary.