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Date: Sat, 15 Mar 2014 09:41:55 -0600
From: Tom Russo <tvrusso AT sandia DOT gov>
To: geda-user AT delorie DOT com
Subject: Re: [EXTERNAL] [geda-user] gschem and ngspice simulation
Message-ID: <20140315154155.GU77723@goldstein.sandia.gov>
References: <53246DFD DOT 7030002 AT systella DOT fr>
 <20140315153508 DOT GT77723 AT goldstein DOT sandia DOT gov>
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On Sat, Mar 15, 2014 at 09:35:08AM -0600, Tom Russo <tvrusso AT sandia DOT gov> wrote:
> On Sat, Mar 15, 2014 at 04:13:01PM +0100, BERTRAND Jo?l <joel DOT bertrand AT systella DOT fr> wrote:
> > .OPTIONS NOPAGE NUMDGT=6 UNITS=Degrees WIDTH=104 ABSTOL=0.00 
> > +CHGTOL=0.00 DEFL=0.00Meg DEFW=0.00Meg GMIN=0.00 PIVREL=-1.798E+306 
> > +PIVTOL=0.00 RELTOL=-1.798E+306 TEMP=20.00
> 
> It's these options, specifically the  RELTOL setting.  Why would you use
> effectively negative infinity for the solver tolerance?
> 
> Remove RELTOL=-1.798E+306 and your circuit runs.

Sorry, I mean remove PIVREL, PIVTOL and RELTOL settings and it runs.
And it is not a great idea to set the abstol and chgtol to zero,
either, even though this particular circuit runs fine with those
settings.

-- 
Thomas Russo      *  tvrusso AT sandia DOT gov          *  Tel: (505) 844-8644
Dept 1355, Electrical Models & Simulation        *  FAX: (505) 284-2518
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