convergence error in cadence using n-port

[padoh]

I am simulating a differential class E amplifier in candence spectre. I have included n-ports at the input lines to include the effect of PCB traces (s2p file). I have run the PSS analysis. I am getting the following errors

Error requirements were not satisfied because of convergence difficulties

and the simulation is not working/not showing results

I have no idea what convergence errors are and how to remove them. Can somebody please help?

 

[fredd]

Can you share your setup settings for the PSS analysis?