dwarning

Don't know your symbol. Write after NX=1 selft=0. Switching off selfheating let the circuit simulate.

This I got after few minutes:

I am afraid nobody can help without more informations: - your both operatings systems? - what is the source of your used binaries? Downloaded from where? - do you compiled...

I can confirm that ngspice has problems in finding OP if L1 is replaced by an s-parameter file. We have to simplify the testcase and analyze it more in detail.

@rupokdas147 ngspice with s-parameter has problems to find operating point in your circuit - as said. A workaround would be to connect the base bias for first transistor direct to...

All this problems stem from the unpredictable DC behavior of the x_sfer function in ngspice. I would recommend to scale down the testcase as much as possible to show the...

I can confirm that multiplier didn't work with Xyce. It seems that Xyce can not change parameter "m" in subckt call. Changing this parameter name to "mult" or something else...

Xyce team has agreed that the parser has a [bug](https://github.com/Xyce/Xyce/issues/134). Change parameter name to mult instead m for symbols and subckt definitions for xyce and ngspice lib's is preferable. Positive...

Xyce is using ADMS. And ADMS can't compile the specific psp NQS code. So for IHP PDK the non NQS version is used for Xyce. IMHO minimal deviations are only...

I am afraid that noise contributions by S2P files can't simulate by ngspice, even if the files contain additional noise data. But NaN looks more as bug. To investigate that...