ngspice / Bugs / #891 gf180 pdk PAD instanciation error with ngspice 47

Dietmar Warning - 4 days ago

Where is the source of your gf180 PDK?

I have two gf180 installations but there is no gf180mcuA/libs.tech/ngspice/sm141064.ngspice'

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- BIBI1760 - 4 days ago
  
  Post awaiting moderation.
  
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Dietmar Warning - 4 days ago

I have an idea what is wrong.
But we are working on open source tools and PDK's which are free available, sorry.

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- BIBI1760 - 4 days ago
  
  Ciel is free
  
  Le mar. 10 nov. 2026, 08:26, Dietmar Warning dwarning@users.sourceforge.net
  a écrit :
  
  I have an idea what is wrong.
  But we are working on open source tools and PDK's which are free
  available, sorry.
  
  [bugs:#891] https://sourceforge.net/p/ngspice/bugs/891/ gf180 pdk PAD
  instanciation error with ngspice 47
  
  Status: open
  Group: v1.0 (example)
  Created: Sun Nov 08, 2026 08:50 AM UTC by BIBI1760
  Last Updated: Mon Nov 09, 2026 06:07 PM UTC
  Owner: nobody
  
  Hi,
  I have a model instantiating a PAD using gf180 PDK
  
  It works fine with ngspice 46 and 44.2 , but i have an error with
  ngspice47 :
  
  **
  
  Error on line 1367 or its substitute: g.xdut.x0.gcmoscap
  xdut.x0.cmoscapint1 0 vss vdd 4.000000000000000e+00 e9 unknown parameter
  (e9)
  
  Hereunder the nelist : (PDK_ROOT must be set to point toward GF180 PDK)
  Thanks for your support
  Bibi
  
  pad instance
  
  Global Default BSIM4 Models
  .model nfet_03v3 nmos level=54 version=4.8.1
  .model pfet_03v3 pmos level=54 version=4.8.1
  .model nfet_05v0 nmos level=54 version=4.8.1
  .model pfet_05v0 pmos level=54 version=4.8.1
  
  .include '$PDK_ROOT/gf180mcuA/libs.tech/ngspice/design.ngspice'
  .lib '$PDK_ROOT/gf180mcuA/libs.tech/ngspice/sm141064.ngspice' ff
  
  .lib '$PDK_ROOT/gf180mcuA/libs.tech/ngspice/sm141064.ngspice' mimcap_ff
  .lib '$PDK_ROOT/gf180mcuA/libs.tech/ngspice/sm141064.ngspice' cap_mim
  .lib '$PDK_ROOT/gf180mcuA/libs.tech/ngspice/sm141064.ngspice' moscap_ff
  .lib '$PDK_ROOT/gf180mcuA/libs.tech/ngspice/sm141064.ngspice' res_ff
  .lib '$PDK_ROOT/gf180mcuA/libs.tech/ngspice/sm141064.ngspice' diode_ff
  
  .include
  '$PDK_ROOT/gf180mcuA/libs.ref/gf180mcu_fd_sc_mcu7t5v0/spice/gf180mcu_fd_sc_mcu7t5v0.spice'
  .include
  '$PDK_ROOT/gf180mcuA/libs.ref/gf180mcu_fd_io/spice/gf180mcu_fd_io.spice'
  
  .param VDD=3.3
  
  VA a 0 PWL(0 0 1000p 0 1100p {VDD})
  
  XDUT a vss vdd vss vss vdd PAD vss {VDD} vss vss vss vdd vss Y
  gf180mcu_fd_io__bi_t
  
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  Related
  
  Bugs: #891
  
  alternate
  
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Dietmar Warning - 3 days ago

Please
tar -czf gf180_ngspice.tar.gz $PDK_ROOT/gf180mcuA/libs.tech/ngspice
and
tar -czf io_spice.tar.gz $PDK_ROOT/gf180mcuA/libs.ref/gf180mcu_fd_io/spice
and
tar -czf mcu_spice.tar.gz $PDK_ROOT/gf180mcuA/libs.ref/gf180mcu_fd_sc_mcu7t5v0/spice

and attach the separate files here. Not the entire PDK tree!

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- BIBI1760 - 3 days ago
  
  Hi,
  
  Attached the 3 archives
  
  BR
  
  Bibi
  
  Le 10/11/2026 à 16:22, Dietmar Warning a écrit :
  
  tar -czf mcu_spice.tar.gz
  $PDK_ROOT/gf180mcuA/libs.ref/gf180mcu_fd_sc_mcu7t5v0/spice
  
  gf180_ngspice.tar.gz
  
  io_spice.tar.gz
  
  mcu_spice.tar.gz
  
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  - BIBI1760 - 3 days ago
    
    Even smarter :-) .... a single archive
    
    tar -czf gf180.tar.gz
    $PDK_ROOT/gf180mcuA/libs.tech/ngspice $PDK_ROOT/gf180mcuA/libs.ref/gf180mcu_fd_io/spice $PDK_ROOT/gf180mcuA/libs.ref/gf180mcu_fd_sc_mcu7t5v0/spice
    
    Then you get :
    
    tar -tzf gf180.tar.gz
    pdk_root/gf180mcuA/libs.tech/ngspice/
    pdk_root/gf180mcuA/libs.tech/ngspice/sm141064_mim.ngspice
    pdk_root/gf180mcuA/libs.tech/ngspice/sm141064.ngspice
    pdk_root/gf180mcuA/libs.tech/ngspice/smbb000149.ngspice
    pdk_root/gf180mcuA/libs.tech/ngspice/design.ngspice
    pdk_root/gf180mcuA/libs.ref/gf180mcu_fd_io/spice/
    pdk_root/gf180mcuA/libs.ref/gf180mcu_fd_io/spice/gf180mcu_ef_io.spice
    pdk_root/gf180mcuA/libs.ref/gf180mcu_fd_io/spice/gf180mcu_fd_io.spice
    pdk_root/gf180mcuA/libs.ref/gf180mcu_fd_sc_mcu7t5v0/spice/
    pdk_root/gf180mcuA/libs.ref/gf180mcu_fd_sc_mcu7t5v0/spice/gf180mcu_fd_sc_mcu9t5v0.spice
    pdk_root/gf180mcuA/libs.ref/gf180mcu_fd_sc_mcu7t5v0/spice/gf180mcu_fd_sc_mcu7t5v0.spice
    
    File is attached
    
    BR
    
    Bibi
    
    Le 11/11/2026 à 08:08, Bibi a écrit :
    
    Hi,
    
    Attached the 3 archives
    
    BR
    
    Bibi
    
    Le 10/11/2026 à 16:22, Dietmar Warning a écrit :
    
    tar -czf mcu_spice.tar.gz
    $PDK_ROOT/gf180mcuA/libs.ref/gf180mcu_fd_sc_mcu7t5v0/spice
    
    gf180.tar.gz
    
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BIBI1760 - 3 days ago

Hi,
i attached the files as requested
BR
Bibi

gf180_ngspice.tar.gz

io_spice.tar.gz

mcu_spice.tar.gz

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Dietmar Warning - 3 days ago

ngspice version 47:

** ngspice-47 : Circuit level simulation program
** Compiled with KLU Direct Linear Solver
** The U. C. Berkeley CAD Group
** Copyright 1985-1994, Regents of the University of California.
** Copyright 2001-2026, The ngspice team.
** Please get your ngspice manual from https://ngspice.sourceforge.io/docs.html
** Please file your bug-reports at https://ngspice.sourceforge.io/bugrep.html
** Creation Date: Oct 23 2026 20:28:17

Note: No compatibility mode selected!

Circuit: global default bsim4 models

Error on line 1367 or its substitute:
g.xdut.x0.gc_moscap xdut.x0.c_moscap_int1 0 vss vdd 4.000000000000000e+00 e9
unknown parameter (e9)
Simulation interrupted due to error!

ngspice pre-master-48:

** ngspice-47+.0 : Circuit level simulation program
** Compiled with KLU Direct Linear Solver
** The U. C. Berkeley CAD Group
** Copyright 1985-1994, Regents of the University of California.
** Copyright 2001-2026, The ngspice team.
** Please get your ngspice manual from https://ngspice.sourceforge.io/docs.html
** Please file your bug-reports at http://ngspice.sourceforge.net/bugrep.html
** Creation Date: Nov 11 2026 13:14:43

Note: No compatibility mode selected!

Circuit: global default bsim4 models

So that means - the problem is fixed in the actual development branch pre-master-48 and will be appear in version 48.

test.txt

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gf180 pdk PAD instanciation error with ngspice 47

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#891 gf180 pdk PAD instanciation error with ngspice 47

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