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Thanks <@U01819B63HP>   Btw I am huge fan of your xschem installation videos. I followed your original youtube video and could install all the tools successfully about a year back. This week I tried to install using the open_pdk way as shown in your 2nd video. Somehow it did not work for me. Will uninstall the old xschem packages..  thanks for your help

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Hi <@U01819B63HP> I removed the old xschem installed and installed a fresh one following your instructions. I have copied the xschemrc file but when I am invoking xschem the top sch for sky130 is not getting displayed..Any pointers on solving this issue? Thanks 

I solved this by copying all the dir from /usr/local/share/pdk to /usr/share/pdk

<@U045RNL9VU2> You can use the installation in `/usr/local/share/pdk`. All you have to do is to set a `PDK_ROOT` environment variable before starting xschem:
`export PDK_ROOT=/usr/local/share/pdk`
If this variable is not given xschem tries to locate some standard of places in following order:
_*(Beware that xschem only checks if the top*_ `pdk` _*directory exists, so if you have an empty*_ `/usr/share/pdk` _*xschem will assume all pdk is sitting there...)*_

`/usr/share/pdk`
or
`/usr/local/share/pdk` 
or
`$HOME/share/pdk`

It does not try any other places, so you must tell xschem (via variable PDK_ROOT) the location of the pdk.

The `PDK_ROOT` variable  is the best option expecially if you have multiple installations.
You can also define a `PDK` variable to specify sky130A or sky130B (the reram process option):
`export PDK=sky130A`
If unset sky130A is assumed.

Thanks <@U01819B63HP> for the detailed reply. It worked after setting the pdk env variable. Thanks a lot for your help