SQL & PL/SQL

Hi All,

When i'm executing below code, I'm getting the error

ERROR -29280ORA-29280: invalid directory path

declare
  v_MyFileHandle UTL_FILE.FILE_TYPE;
BEGIN
  v_MyFileHandle := UTL_FILE.FOPEN('$XXX_OUT', 'HELLO.TXT', 'a');
  
  UTL_FILE.PUT_LINE(v_MyFileHandle,
                    'Hello Again for the Second Time! ' ||
                    TO_CHAR(SYSDATE, 'MM-DD-YY HH:MI:SS AM'));
                    
  UTL_FILE.FCLOSE(v_MyFileHandle);
  
  null;
  
EXCEPTION
  WHEN OTHERS THEN
    DBMS_OUTPUT.PUT_LINE('ERROR ' || TO_CHAR(SQLCODE) || SQLERRM);
    NULL;
END;

Please let me know if someone has any idea on this error.

Regards,