@Ashutosh Kumar From iic-osic documentation: did you run this command:

source ./iic-init.sh

to initialize environment? If you did: Do you have in your home directory a

~/.xschem/xschemrc

file? can you send this file? The above error happens when in a tcl script (the xschemrc file) you attempt to use a variable that has never been set/defined before. The original xschem_sky130 xschemrc file always tests if PDK_ROOT exists before using it, however open_pdks does some processing on this file and may be it assumes the tcl PDK_ROOT variable is set from a shell variable PDK_ROOT. Before starting xschem try to set the PDK_ROOT shell variable to point to your pdk install path:

export PDK_ROOT=.../.../share/pdk

If you start xschem from the terminal and no pdk is found you probably see this message:

No open_pdks installation found, set PDK_ROOT env. var. and restart xschem

@Stefan Schippers I attached the xschemrc file. thank you

@Ashutosh Kumar The

.../...

i wrote above should not be copied as is. You need to set PDK_ROOT to point to the actual path on your system. It can be

/usr/local/share/pdk

or any other path. You need to provide the right location of the open_pdks installation.

@Stefan Schippers sorry I tried with this command export PDK_ROOT=/home/kashi/pdk but I got error while opening xschem from the "home dir" but different dir i got different error like pdk_root: not variables thank you

@Ashutosh Kumar create a new directory, copy the xschemrc file into this directory, start xschem from this directory. At the xschem prompt (in the terminal where you launched xschem) type:

puts $XSCHEM_LIBRARY_PATH

and send me the result Where is

libs.tech

located on your system? it seems your install is different from a plain

open_pdks

install. If install paths are different you must ask to people who have arranged this setup. If the pdk is installed in a different directory structure the xschemrc must be set up accordingly, expecially the XSCHEM_LIBRARY_PATH list of directories, that must point to the installed xschem symbols. If things keep failing delete EVERYTHING, ensure no xschem and magic executables are on the system. no dockers, containers or other stuff are lying around, delete

.xschem/

directory in your home directory, ensure no xschem starts if you type xschem and proceed with open_pdks installation (see Download and INSTALL), including all prerequisites (magic and xschem). When finished, create an empty directory, copy the

xschemrc

from open_pdks installation (

/installation/path/share/pdk/sky130A/libs.tech/xschem/xschemrc

, where

/installation/path

must be replaced with the actual path where open_pdks did the install on your system) and start xschem from that directory. This is the right way to start xschem on a sky130 project.