SILVACO MixedMode 仿真无法调用MOSFET

damselfish

代码如下：
.begin
a1 1=tra_gate 2=sto1_gate 3=ins1_gate 4=sto2_gate 4=ins2_gate 0=substrate infile=new11.str width=1
v1 1 0 pulse 0 2.8 1000ns 0.001ns  0.001ns 500ns 1
v2 6 0 pulse 0 5 1400ns 0.001ns  0.001ns 500ns 1
v3 0 3 2
v4 4 0 0
v5 5 0 3.3
o1 1 0 pulse 0 20 10ns 0.001ns 0.001ns 1000ns 1

Mcon 5 6 2 0 nmos L=10u W=5u
.end

在调用MOSFET模型时，报错：Too many nodes defined in M line.
请大指导一下问题所在