If you can run OK with the newer spectre interface, then use that. The spectreS interface is obsolete and should only be used if you have no other choice - it doesn't support many of the newer analyses as it has not been updated for several releases, and will be going away shortly.

Since you say you can run with the spectre interface, you should be able to run any swept analyses too.

You don't really give any details of what the problems are with your simulation run, so I can't give any more specific help, I'm afraid.

Best Regards,

Andrew.

With the spectre interface there is no "SPSS" analysis (primarily because there is no SPSS analysis natively in spectre). On the choose analysis form for pss, there is a checkbox near the bottom labelled "sweep" which is how you set up a sweep.

That said, you can also do a sweep using Tools->Parametric Analysis - but it's more direct using the sweep on the pss form.

Also, in order to plot IIP3, you don't actually have to do a sweep - since IIP3 is measured at a single input power. That said, people like to sweep input power as it enables you to check that you're measuring it in the right place (and have picked the correct harmonics).

Regards,

Andrew.

Please read the SpectreRF User Guide. It's covered there.
Either look for this in cdsdoc, or:

<instdir>/doc/spectreRF/spectreRF.pdf

Regards,

Andrew.