there is a check box for dc simulation, no question for that part.
I tried to put "homotopy=dptran" in the ac simulation->option->additionalparameters, but the ac simulation still tired "gmin" and "source" method before dptran.
I searched online but didn't find any useful information, I also tried "set homotopy=dptran", it causes a simulator error.
What's the correct syntax?
Regards