SQL & PL/SQL

Hi,

I am getting following error for external table, trying to load data in external table from a pipe delimited file.

ORA-29913: error in executing ODCIEXTTABLEOPEN callout
ORA-29400: data cartridge error
KUP-04040: file BIPO_04_28_2010_18_53_11.txt in AB501 not found
29913. 00000 -  "error in executing %s callout"
*Cause:    The execution of the specified callout caused an error.
*Action:   Examine the error messages take appropriate action.

here is the code for creating table

CREATE TABLE ' || whr_ext_tab || '
    (
        partner_product_code VARCHAR2(30), -- Partner’s product code or part number
        product_description VARCHAR2(60), -- Product description
        po_comments VARCHAR2(254), -- Purchase Order Comments
        wr_member_number VARCHAR2(60), -- Rewards Member Number
    )
    ORGANIZATION EXTERNAL
      (  TYPE ORACLE_LOADER
         DEFAULT DIRECTORY "<dir>"
         ACCESS PARAMETERS
           ( RECORDS DELIMITED BY NEWLINE
                    BADFILE ''BIPO.bad''
                    LOGFILE ''BIPO.log''
                    FIELDS TERMINATED BY ''|''
                    MISSING FIELD VALUES ARE NULL
             )
         LOCATION ("<dir>":''<fn>'')
      )
    REJECT LIMIT UNLIMITED
    NOPARALLEL
    NOMONITORING
  ';

thanks
sandy