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Date: Tue, 8 Nov 2011 09:19:33 -0800
From: Colin D Bennett <colin AT gibibit DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] duplicate refdes values
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On Tue, 8 Nov 2011 06:38:31 -0700
John Doty <jpd AT noqsi DOT com> wrote:

> 
> On Nov 8, 2011, at 3:06 AM, Cyril Hrubis wrote:
> 
> > Hi!
> > I've got bitten by this once more and decided for fix. The
> > problem is that I've, by a mistake, forgot to change refdes on
> > one of my resistors and spend another ten minutes by figuring
> > out what went wrong.
> > 
> > What I want to fix is that both gsch2pcb and pcb are silent
> > about this and the pcb just picks up only one of them.
>...
> 3. The drc2 back end to gnetlist already complains about
> duplicated refdes values for non-slotted components. Checking a
> design for errors is what drc2 is for, and if you're not using
> multiple heterogeneous symbols for parts, drc2 will do what you
> want here. The problem is that this isn't necessarily an error:
> this is one of the many cases where drc2's model of design is
> narrower than the capabilities of the toolkit. In this case, it
> is hard to fix drc2, as the indications of true error
> (inconsistent pin connections) are hidden behind the
> unnecessarily opaque gnetlist back-end API.

Agreed, the drc2 backend has caught my copy-and-pasting symbols
without changing the refdes many times.  I always run my drc script
after making schematic changes.  It might be a good idea for users
to include a drc2 run in the script that runs gsch2pcb (Makefile,
shell script, whatever).

Regards,
Colin