Re: NEC-LIST: Problems with SOMNEC and realistic ground

Thank you all very much for your help. I'm sorry but I forgot to mention
that I was running a GNU/Linux version of NEC-2. It's a precompiled
version which comes with the Debian GNU/Linux distribution. However, I
will try a windows/dos version (gasp!) and see how that runs.

Cheers, Simon

On Wed, 2003-06-18 at 23:51, 4nec2_at_gmx.net wrote:
> > Hello, I've been trying to model power line harmonic radiation from the
> > local power distribution system using NEC2.
> > The power lines I am modelling are above a flat ground, so I am using
> > the Sommerfeld/Norton method. In my .nec punch card file I use "GE 1"
> > (ground plane) and "GN 2 ..." (implying the Sommerfeld/Norton method). I
> > am also using SOMNEC to create a TAPE21 file, as mentioned in the
> > manual. However when I use the Sommerfeld/Norton method and run nec2 I
> > get the following error:
> >
> > start: end of file
> > apparent state: unit 21 named fort.21
> > lately reading sequential unformatted external IO
> > Aborted
> >
> > This does not occur when I don't use the S/N method, such as when I use
> > a perfect ground. I have included my .nec file as well. Any help would
> > be much appriciated.
>
> Simon, I did some small tests with and without a pre-generated
> SomNec ground-file, but was not able to produce similar error-
> message.
>
> I do not know what OS you are running and what nec2 executable
> you are using.
>
> When using the Sommerfeld ground with the original nec2 engine
> this requires a pre-generated ground file, created with the
> SomNec2d.exe program (at least on DOS/Windows).
> However when no Som2d.nec file is available I get a distinct
> error from the one you mentioned, so I don't believe this missing
> of a SomNec ground input-file (Tape21) is causing theproblem....
>
> Arie.
>
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