[SOLVED] Unknown model type spice2poly

Schematic Simulation (Ngspice)
1

I am using a manufacturer SPICE model which contains this statement
F1 4 10 POLY(2) VS1 VS2 (0,2.42834E-5,3.8E-5)

which leads to a warning when running the simulator.

a$poly$f.xu1.f1 %vnam [ v.xu1.vs1 v.xu1.vs2 ] %id ( 0 xu1.10 ) a$poly$f.xu1.f1
MIF-ERROR - unable to find definition of model a$poly$f.xu1.f1
Warning: Model issue on line 0 :
.model a$poly$f.xu1.f1 spice2poly coef = [ 0 2.42834e-5 3.8e-5 ] ...
Unknown model type spice2poly - ignored

Does someone know how to fix this issue without reinstalling ngspice or KiCad stable? Some workaround how to define this model as a function or something like this?

I found some posts, but could not really solve it.


https://sourceforge.net/p/ngspice/discussion/127605/thread/5356888d/
https://archives.seul.org/geda/user/Jun-2006/msg00165.html
2

What version of KiCad are you using? Does the spice2poly.cm file exist in your KiCad/lib/ngspice/ directory? Also, are you able to upload here the entire subcircuit for this device?

3

Thanks for the reply. There is a /usr/local/lib/ngspice/spice2poly.cm in my drive, but not under KiCad.

The models is this one:
https://www.analog.com/media/en/simulation-models/spice-models/ad780.cir

I am using

Application: Eeschema
Version: 5.1.6-c6e7f7d~87~ubuntu18.04.1, release build
Libraries:
    wxWidgets 3.0.4
    libcurl/7.58.0 OpenSSL/1.1.1 zlib/1.2.11 libidn2/2.0.4 libpsl/0.19.1 (+libidn2/2.0.4) nghttp2/1.30.0 librtmp/2.3
Platform: Linux 5.4.0-40-generic x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8) GTK+ 3.22
    Boost: 1.65.1
    OpenCASCADE Community Edition: 6.9.1
    Curl: 7.58.0
    Compiler: GCC 7.5.0 with C++ ABI 1011

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=ON
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_PYTHON3=ON
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_WXPYTHON_PHOENIX=ON
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON
4

It somehow got solved. I had lately uninstalled ngspice via sudo apt remove ngspice. I had reinstalled it yesterday, but somehow it did not find it. After (I guess) restarting KiCad, it works fine and I get this 'message instead:
Reducing trtol to 1 for xspice 'A' devices

5

Ah, OK. Glad it works now. Yeah, the TRTOL message is perfectly normal.

1 Like
6

Just got the same error from the same demo under Kicad 6.02. Restarting Kicad does not solve the problem.

7

This is an installation problem.

What is your operating system?

8

If you are on Ubuntu (you did not tell us), try reinstalling ngspice:
sudo apt installl ngspice
as done here Kicad 6.0 & ngspice 31 - #7 by tylerkiwi sucessfully.

1 Like