Dear I ve been extracting netlists from layou

Question

Dear < Tim Edwards> I ve been extracting netlists from layouts in MAGIC through a command line in Jupyter Notebook Nonetheless something is happening in between when I execute the command line `PDKPATH= $ PDK ROOT sky130A magic dnull noconsole mag files waffles nmos tcl` I get different parasitics when I execute it in Jupyter or in the main Linux terminal I don t know the cause of the problem as I only change the place I m accessing the terminal I suppose it may be something to do with the kernel I hope you can help me understand what is going on Best regards Vicente Osorio Rivas

Tim Edwards · Answer

Most likely it has to do with the version of Magic The parasitic capacitance modeling was updated relatively recently I occasionally update the parasitic coefficients in open pdks but I have not done so for SkyWater recently so I suspect the differences come from the version of magic being used

Tim Edwards · Answer

There was however a very recent change in the PDK where some contact types were missing from a list and so their resistances were not contributing to the parasitics I doubt that s what you re seeing though