sqlloader

I have a ctl file : and it is giving me an error. I think it does not like the columns such as AT_NBR                                       NUMBER, but I have no choice that column does not have the number(6) or some specific size defined. So how can I bypass that and still load the csv file into the table?
LOAD DATA
INFILE 'test.csv'
   INSERT INTO TABLE s48.mytab
FIELDS TERMINATED BY "," OPTIONALLY ENCLOSED BY '"' TRAILING NULLCOLS
(ACCT_NBR                                     NUMBER(31),
 AT_NBR                                       NUMBER,
 AT_ACCT_NBR                                  NUMBER,
 ND_ACCT_NBR                                NUMBER(16),
 
 JOIN_DT                                      DATE 'mm/dd/yyyy',
 A_CLOSE_DT                                     DATE 'mm/dd/yyyy',
 T_TYPE                                          VARCHAR2(3),
 
 _CRTE_DIFF                                     NUMBER,
 N_ID                                           NUMBER
 
)