Re: gEDA-user: gnucap segmentation fault

[al davis <ad151@xxxxxxxxxxxxxxxx>]

On Thursday 14 February 2008, Robert Butts wrote:
> I am simulating a circuit that has an LM741 and I'm getting a
> segmentation fault.  I suspect the problem may be because the
> symbol I'm using for the LM741 has two pin error.  The
> symbol's pin attributes areIt so happens that these two pins
> are the two offset null pins.  I don't see these pins in the
> symbol.  See an excerpt of the netlist below and the gnetlist
> cammand output below that:
......................
> .SUBCKT LM741        1   2  99  50  28
..................
> X2 ecuMic 1 -Vcc LM741
..........................
> X1 bottomLeg topLeg -Vcc LM741

> Is this the cause of the segmentation fault?  If so, there is
> no pin 1 or 5 in the symbol.  How can I correct it?

It doesn't segfault for me. 

As you figured out, the problem is that the .subckt wants 5 
connections and only gets 3 connections.

In 0.35, it works as designed which is to float the extra 
connections.  It should give a warning or error message, but 
doesn't.  

The snapshot gives an error message and stops, as designed.

Apparently, the pin mapping on the op-amp symbol does not match 
the .subckt.  There is no standard for that, so all I can think 
of is that you need to manually edit the netlist to fix it.  In 
my experience, the netlist generated by gnetlist usually needs 
manual editing to work.


_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user