hspice**error** model name nmos in the element 0:mn is not defined.

这是我的code：
****SPICE Input File*****
.param Supply=1.8 * Set value of Vdd
.lib 'bsim3v3.cmos..18um' * Set 0.18um library
.opt scale=0.1u * Set lambda

mn drainn gaten Gnd Gnd NMOS l=2 w=4 ad=20 pd=4 as=20 ps=4
Vdd Vdd 0 'Supply'

Vgsn gaten 0 dc

Vdsn drainn 0 dc

.dc Vdsn 0 'Supply' 'Supply/20' Vgsn 0 'Supply' 'Supply/4'

.plot dc I1(mn)
.end
我用hspice模拟后出现错误，请大神指教，很急谢谢。
**error** model name nmos in the element 0:mn
is not defined.

***** job aborted
1****** HSPICE -- F-2011.09-SP1 32-BIT (Nov 18 2011) winnt ******
******
****spice input file*****

****** job statistics summary tnom= 25.000 temp= 25.000 *****

****** HSPICE Threads Information ******

相关了解……