Oracle Message ORA-02730 - osnrnf: cannot find user logon directory

ERRORosnrnf: cannot find user logon directory
CAUSEThe driver you have specified could not find your logon directory while searching for your local .sqlnet file.
ACTIONSet and export the HOME environment variable to identify your home directory. Check with your system administrator to make sure that your uid and home directory are correct in the /etc/passwd file.