Accessing File From Directory?

have a log file in unix server under(/usr/home/oraj/log/abc.log) I am trying to access from oracle stored procedure as fallows

src_clob BFILE := BFILENAME('/usr/home/oraj/log', 'abc.log');

Exception:
ERROR at line 1:
ORA-22285: non-existent directory or file for FILEOPEN operation
ORA-06512: at "SYS.DBMS_LOB", line 716
ORA-06512: at "usr.LOAD_CLOB_FROM_XML_FILE", line 39
ORA-06512: at line 1

I dont want to create directory as such ('/usr/home/oraj/log') as it is already exists and all log files sits there.

CREATE OR REPLACE PROCEDURE Load_CLOB_From_XML_File
IS
dest_clob CLOB;
src_clob BFILE := BFILENAME('/usr/home/oraj/log/', 'abc.log');
dst_offset number := 1 ;
src_offset number := 1 ;

[code]...