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[Help-gnucap] Bizarre behaviour -- possibly a bug.

From: Orestes Mas
Subject: [Help-gnucap] Bizarre behaviour -- possibly a bug.
Date: Sat, 25 May 2013 20:45:11 +0200
User-agent: KMail/1.13.7 (Linux/3.2.0-4-amd64; KDE/4.8.4; x86_64; ; )


I've a simple linear circuit showing strange results:

Bizzarre output
Vg 1 0 DC 9V
R1 1 2 6.7
Rb 2 3 80
L1 3 0 25.2mH ic=0

.TRAN 0 5m 50u UIC

All elements are in series, so clearly I(Vg)=-I(L1)
But instead, the first output value of I(Vg) is -900kA, and should be zero. 
Current through the inductor is OK.

This does not happen if "UIC" is removed from TRAN command. Why? Are voltage 
independent sources using initial conditions internally?

Ah, I nearly forgot it: I'm using Gnucap 2009.12.07 RCS 26.136. Not tested 
with stable release.

Orestes Mas.

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