SQL & PL/SQL

hi, i tried to do bulk collect into a record type,but am getting error as "is in appropriate as left hand side of an assignment"

here are queries

open c_rtl_pickup_incr(p_branch_code,l_m_end_date);
fetch c_rtl_pickup_incr bulk collect
into ty_tb_temp_tab ;
close c_rtl_pickup_incr ;

record type that i used
type ty_tb_temp_tab is table of eitb_rtl_clg_stg%rowtype index by pls_integer;