ORA-01036: illegal variable name/number when creating external table

[wgself]

I get the referenced error when I execute the following script:
create table dol_sch_c_part2
(DLN NUMBER(14) ,
PAGE_ID VARCHAR2(20),
PAGE_SEQ VARCHAR2(20),
PAGE_ROW_NUM VARCHAR2(20),
ROW_NUM VARCHAR2(20),
IMAGE_FORM_ID VARCHAR2(20),
PROVIDER_TERM_01_NAME VARCHAR2(35),
PROVIDER_TERM_01_EIN VARCHAR2(9),
PROVIDER_TERM_01_POSITION VARCHAR2(25),
PROVIDER_TERM_01_STR_ADDRESS VARCHAR2(35),
PROVIDER_TERM_01_CITY VARCHAR2(20),
PROVIDER_TERM_01_STATE VARCHAR2(2),
PROVIDER_TERM_01_ZIP_CODE VARCHAR2(9),
PROVIDER_TERM_01_PHONE_NUM VARCHAR2(10),
PROVIDER_TERM_01_TEXT VARCHAR2(250)
)
ORGANIZATION EXTERNAL
( type oracle_loader
default directory data_dir
logfile 'ext_tab.log'
access parameters
(
RECORDS FIXED 510
FIELDS
(
DLN(1:14) char(14),
PAGE_ID(15:34) char(20) NULLIF PAGE_ID=BLANKS,
PAGE_SEQ(35:54) char(20) NULLIF PAGE_SEQ=BLANKS,
PAGE_ROW_NUM(55:74) char(20) NULLIF PAGE_ROW_NUM=BLANKS,
ROW_NUM(75:94) char(20) NULLIF ROW_NUM=BLANKS,
IMAGE_FORM_ID(95:114) char(20) NULLIF IMAGE_FORM_ID=BLANKS,
PROVIDER_TERM_01_NAME(115:149) char(35) NULLIF PROVIDER_TERM_01_NAME=BLANKS,
PROVIDER_TERM_01_EIN(150:158) char(9) NULLIF PROVIDER_TERM_01_EIN=BLANKS,
PROVIDER_TERM_01_POSITION(159:183) char(25) NULLIF PROVIDER_TERM_01_POSITION=BLANKS,
PROVIDER_TERM_01_STR_ADDRESS(184:218) char(35) NULLIF PROVIDER_TERM_01_STR_ADDRESS=BLANKS,
PROVIDER_TERM_01_CITY(219:238) char(20) NULLIF PROVIDER_TERM_01_CITY=BLANKS,
PROVIDER_TERM_01_STATE(239:240) char(2) NULLIF PROVIDER_TERM_01_STATE=BLANKS,
PROVIDER_TERM_01_ZIP_CODE(241:249) char(9) NULLIF PROVIDER_TERM_01_ZIP_CODE=BLANKS,
PROVIDER_TERM_01_PHONE_NUM(250:259) char(10) NULLIF PROVIDER_TERM_01_PHONE_NUM=BLANKS,
PROVIDER_TERM_01_TEXT(260:509) char(250) NULLIF PROVIDER_TERM_01_TEXT=BLANKS
)
)
location ('f_dol_sch_c_part2.txt')
)

[wgself]

Well I got it!
I removed the logfile line completely and ran it from sqlplus.
Apparently SQL Navigator doesn't handle external file creation scripts properly.
Thanks for your assistance.