>Try
>

>select *
>	from person p
>		inner join referral r on p.cl_ref = r.cl_ref
>			where p.cl_dob > (
>					select GOMONTH(min(EVL(rr.re_date, {^9000-12-31}), -216))
>						from referral rr
>						where rr.cl_ref = p.cl_ref )

That seems to fail on the min() function call, it's expecting 2 arguments...

Thanks
Kev