Attribute 'rtrim' is repeated

In trying to trim some data while selecting and loading from 2 tables
into 1 I get the following:

SELECT TRIM(TRAILING ' ' FROM s.strk_sym_cmplt), TRIM(TRAILING ' ' FROM
s.stk_sym), s.c_p, o.dta_date, o.dta_date_num, o.dta_date_dys, o.strk_sym,
o.strk_yr, s.strk_num, s.exp_sym, s.exp_mo, s.exp_mo_num, s.exp_yr,
s.exp_yr_num, s.exp_date, s.exp_date_dys, o.opn, o.hi, o.lw, o.cls, o.vol,
o.opn_intrst, o.bd, o.ak
INTO TABLE optn_calls_tbl
FROM option_data_oprtnl o, strk_data_oprtnl s
WHERE TRIM(TRAILING ' ' FROM o.strk_sym_ful) = TRIM(TRAILING ' ' FROM
s.strk_sym_cmplt) AND s.c_p = 'C';
ERROR:  Attribute 'rtrim' is repeated

I understand that rtrim is an underlying function to trim.  Is this a BUG???
How do I fix this problem?

Thanks for your help!
Lynn Tilby