HP Unix-11.0
I installed Oracle on HP Unix, had some installation problem in linking but then taking some steps and issuing,

$ relink all

It looks like Oracle installation was successful.

Now, When I am trying to open SQL Plus for the first time it gives following message:

$ sqlplus
/usr/lib/ Can't open shared library: /opt/java/jre.1.1.8/lib/PA_RISC/nativethreads/ No such file or directory