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Quantus QRC generates "nan" valued resistors. Spectre throws an error and halts simulation

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Hi.

I'm running Quantus RLCK and I noticed that sometimes it creates on or two "nan" valued resistors (either using ladder-network model or not).

This doesn't happen for RC extraction.

The problem is that spectre then halts simulation and throws: " parameter `r': Cannot run the simulation because an unknown parameter `nan' has been specified in expression `-nan'. Correct the expression and rerun the simulation."

Am I doing something wrong? Currenlt, the best I can do is tweak layout to prevent there resistances from being generated

Assura: 4.1_USR6_HF3

Quantus version: 19.1.3-s062

Spectre: 161 through 191, latest USRs

Cheers,

Matan


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