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Date: Sun, 27 Nov 2022 17:01:48 +0100 (CET)
From: Roland Lutz <rlutz AT hedmen DOT org>
To: "Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Subject: Re: [geda-user] some new friction between gschem and pcb
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Hi Britton,

in recent versions of gEDA/gaf, backends can come in a Python version and 
a Guile version.  PCB invokes the Guile version of the `pcbfwd' backend. 
This is a file called `gnet-pcbfwd.scm' which should have been installed 
into the proper path by PCB.

So either PCB didn't install the file into the correct path, or gEDA/gaf 
isn't configured to look for it in the correct path.  This most likely 
happens when you install gEDA/gaf and PCB to different prefixes.

You can fix this by adding the directory where `gnet-pcbfwd.scm' has been 
installed to your Guile search path.  To do so, add a line

   (scheme-directory "/the/path")

to your gafrc or gnetlistrc file (preferably the global one in ~/.gEDA/ so 
it doesn't depend on the working directory passed by PCB).

You can check if this worked via `gnetlist --list-backends'.  If it shows

   [PG] pcbfwd

then both the Python version (packaged with gEDA/gaf) and the Guile 
version (packaged with PCB) are visible to gnetlist.

Roland