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Date: Mon, 24 Oct 2016 08:07:59 +0200 (CEST)
From: Roland Lutz <rlutz AT hedmen DOT org>
To: "Atommann (atommann AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Subject: Re: [geda-user] COSMAC ELF in gEDA and the power rail problem for
 logic ICs
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On Mon, 24 Oct 2016, Atommann (atommann AT gmail DOT com) [via 
geda-user AT delorie DOT com] wrote:
> for the CD4013 D-type flip-flops symbols, it has built-in VDD and VSS 
> nets. But the pins for them are now shown. I searched gEDA's mainling 
> list and people suggested that you can make a symbol which only has the 
> VDD and VSS pins.

Have you created matching gate symbols whithout the net= attributes? 
Otherwise, those conflict with your power symbol.

See here for an explanation:
http://wiki.geda-project.org/geda:na_howto
http://wiki.geda-project.org/geda:na_howto.ru