Oracle error during database creation --- ORA-01092: ORACLE instance terminated. Disconnection forced

Experts,

I am getting this ORA-01092 during database creation  ---- Oracle9i database on Solaris

I tried a bunch of things --- ranging from changing the init.ora parameters ,
tried creating without UNDO, temp tablespaces etc.
this getting this error.

(I created a similar database successfully on Redhat Linux9 with almost identical settings and it worked
But getting this error on Solaris)
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THis is the content of the alert log :

ORA-01501: CREATE DATABASE failed
ORA-01526: error in opening file '?/rdbms/admin/sql.bsq'
ORA-07391: sftopn: fopen error, unable to open text file.
Error 1526 happened during db open, shutting down database
USER: terminating instance due to error 1526
Instance terminated by USER, pid = 9056
ORA-1092 signalled during: CREATE DATABASE HANPROD NOARCHIVELOG
      control...
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