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convergence error in cadence using n-port

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padoh

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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?
 

Can you share your setup settings for the PSS analysis?
 

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