为什么Hspice无法检查几何？

Question

我在hspice中收到此警告，我该如何解决呢？

warning (CMOS180nm.sp:3) Model nmos device geometries will not be checked against the limits set by lmin, lmax, wmin and wmax. To enable this check, add a period(.) to the model name(i.e. enable model selector).