Hello . I am getting the following warning in xschem. I replaced

$SKYWATER_MODELS

;`netlist_dir`;

$XSCHEM_LIBRARY_PATH

and

PDK_ROOT

in the xschemrc file. Is there any more configuration missing?

Can you share your

xschemrc

file?

The directory

/edatools/pdks/

has the

open_pdks

,

skywater-pdk

and

sky130A

folders.

From your

xschemrc

file

if { [info exists env(PDK_ROOT)] && $env(PDK_ROOT) ne {} } {
  ## found variable, set tcl PDK_ROOT var
  if {![file isdir $env(PDK_ROOT)]} {
    puts stderr "Warning: PDK_ROOT environment variable is set but path not found on the system."
  }
  #set PDK_ROOT 
  set PDK_ROOT /edatools/pdks/
} else {
  ## not existing or empty. 
  puts stderr "Warning: PDK_ROOT env. var. not found or empty, trying to find an open_pdks install"

So if you don't have a shell environment

PDK_ROOT

variable set, you'll get this message

Warning: PDK_ROOT env. var. not found or empty, trying to find an open_pdks install

Setting

PDK_ROOT

inside the

if

statement won't work. Before you run

xschem

, try

export PDK_ROOT=/edatools/pdks

It worked. So, do I always need to use the export command before running xschem?

... or do

set ::env(PDK_ROOT) /edatools/pdks

Do I use

set ::env(PDK_ROOT) /edatools/pdks

instead of

set PDK_ROOT /edatools/pdks/

?

At the beggining of the file, probably should work

It worked. I put

set ::env(PDK_ROOT) /edatools/pdks

at the beginning of the xschemrc file. Thank you for your help!

The recommended way is to just do a

export PDK_ROOT=/edatools/pdks

in the bash terminal and then start xschem. Doing

set ::env(PDK_ROOT) /edatools/pdks

inside a tcl file (the xschemrc) does the same thing, that is, set an environmental variable.

Okay, thanks, @Stefan Schippers.

the location of the file is important. idk where the .spiceinit needs to be

I get it. My

.spiceinit

file is in my directory

/home/wisla/sky130_skel

. In the skel folder has all my schematics and

xschem_sky130

folder.

@wisla morais the .spiceinit file must be in the directory where ngspice is running. At the xschem prompt you can do a

puts $netlist_dir

to get the location. If you didn't do any express setup it should be

~/.xschem/simulations

It worked. Thank you @Stefan Schippers