Where can there be an error here (the procedure compiles fine)?

Question

Oracle

I don't see an error, but there is one.

PROCEDURE REPL_TABLE(idtab in number default -1)
 as
begin
 for cc in ( select id_repl_table, xxx
                from repl_table_list
               order by srt, id_repl_table
            )
  loop
   if (cc.id_repl_table = idtab) then
     REPL_TABLE_BSM1(cc.id_repl_table, cc.xxx);
   end if;
  end loop;
end;

Thank you!