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Date:	Sat, 4 Mar 2023 20:19:14 +0100 (CET)
From:	Roland Lutz <rlutz AT hedmen DOT org>
To:	"Richard Rasker (rasker AT linetec DOT nl) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Subject:	Re: [geda-user] Strange errors importing gschem into PCB
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Hi Richard,

On Sat, 4 Mar 2023, Richard Rasker (rasker AT linetec DOT nl) [via 
geda-user AT delorie DOT com] wrote:
> However, things are somehow broken now. Nothing happens when I choose File
> -> Import Schematics -> gschem to import a slightly modified schematic, and
> the Log window also doesn't show an error message.

this happens if the GTK2 bindings for Python are missing.

> When I start PCB from the command line, I see the following errors when I
> try importing the schematic:
> 
> Loading schematic [/home/richard/electron/Test/Test_Err.sch]
> package `U101' (unmangled), pin `8': error: multiple nets connected to pin:
> "5V" vs. "unconnected_pin-2"
> package `U101' (unmangled), pin `4': error: multiple nets connected to pin:
> "GND" vs. "unconnected_pin-3"
> package `U102' (unmangled), pin `8': error: multiple nets connected to pin:
> "unconnected_pin-4" vs. "5V"
> package `U102' (unmangled), pin `4': error: multiple nets connected to pin:
> "unconnected_pin-5" vs. "GND"
> could not open action file "/tmp/pcb.XX9e3A0V/gnetlist_output"
> 
> […]
> 
> Does anyone have an idea what is wrong here?

I added a few sanity checks to gnetlist which are supposed to catch common 
errors in the input schematics, like in this case, a pin being connected 
to one net in one (partial) symbol and to another net in another symbol. 
Apparently, this check is too strict: since you didn't connect the power 
pins in one of the symbols, gnetlist inserted an automatic "unconnected 
pin" net which conflicts with the power net.

As a workaround, you can copy the power connections to all instances of 
the dual opamp symbol (make sure to swap them for the top-left, flipped 
symbol).

Roland

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