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Date:	Sat, 15 Mar 2014 09:35:08 -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:	<20140315153508.GT77723@goldstein.sandia.gov>
References:	<53246DFD DOT 7030002 AT systella DOT fr>
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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.


> Transient solution failed -
> Note: Starting dynamic gmin stepping
> Trying gmin =   1.0000E-03 Warning: Further gmin increment
> Trying gmin =   5.6234E-03 Warning: Further gmin increment
> Trying gmin =   8.6596E-03 Warning: Further gmin increment
> Trying gmin =   9.6466E-03 Warning: Further gmin increment
> Trying gmin =   9.9105E-03 Warning: Further gmin increment
> Trying gmin =   9.9775E-03 Warning: Further gmin increment
> Trying gmin =   9.9944E-03 Warning: Further gmin increment
> Trying gmin =   9.9986E-03 Warning: Further gmin increment
> Trying gmin =   9.9996E-03 Warning: Last gmin step failed
> Warning: Dynamic gmin stepping failed
> Note: Starting source stepping
> Supplies reduced to   0.0000% Note: One successful source step
> Supplies reduced to   0.1000% Supplies reduced to   0.0000% Note: One 
> successful source step
> Supplies reduced to   0.0100% Supplies reduced to   0.0000% Note: One 
> successful source step
> Supplies reduced to   0.0015% Supplies reduced to   0.0000% Note: One 
> successful source step
> Supplies reduced to   0.0002% Supplies reduced to   0.0000% Note: One 
> successful source step
> Supplies reduced to   0.0000% Warning: source stepping failed
> doAnalyses: Too many iterations without convergence
> 
> run simulation(s) aborted
> Error(parse.c--checkvalid): vout: no such vector.
> 
> 	I have used spice a long time ago and I don't see where is my mistake. 
> Any idea ?
> 
> 	Best regards,
> 
> 	JB

-- 
Thomas Russo      *  tvrusso AT sandia DOT gov          *  Tel: (505) 844-8644
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