Hspice DC simulation Help
Basically this will run the simulation with dummy = 1.  

The .dc command defaults to a linear scale, but you've put 1 as the starting point, ending point, and increment.

If you want to run the simulation with dummy = 1, then 2, then 3 for example use
.dc dummy 1 3 1 (i.e. 1 to 3 incremented by 1)

see http://www.ecircuitcenter.com/SPICEsummary.htm