pss simulation not enough memory

Dear all,

I am doing PSS simulation of my circuit. I have already set to save the selected net. However, it is still not enough memory to run it. The simulation will terminate it automatically. I find the simulation just using real memory ( I have 4G ) and don't use my swap (8G). Why will it happen? Why the simulation does not use swap space to run it? How could I fix not enough memory?

thanks

CHI

-Perhaps you save all voltages and currents in your circuit.Refine these and save only which you're interested in.
-Change the simulation accuracy from conservative to moderate
-Use less harmonics

I guess there will be a environment variable in order to use swap memory in .cshrc (or .bashrc ),use it ...

- I have saved the selected net

- I have set in liberal

- I use one harmonic only

still the same problem

-How many active devices are there in your ciruit ?
-Which version of MMSIM do you use ?
-What about model do you use ?
...

There may be so many variable that can change your memory consumption.
In my opinion, there is a bug that creates this problem..