Re: NEC-LIST: NEC-4 Expansions

Hello Darryl,

I have some small experiences modifying and using the nec-2 sources. Maybe I
can give some hints..

> 1 - The 10,000 segments just barely make the simple cases.
> 2 - I need about 500 connections from a Green's function solution.
> 3 - I need nearly a thousand resistive loaded segments (LD).
>
> For item (1), I am aware of William Slauson's post on 10/04/04
> concerning an apparent 10K segment limit without modifying the Fortran
> source. Has anyone worked out how to double (or so) this value?

For as far as I know thers is not such a limit. It there is one it's around
32767 (max integer*2 value). However, there may be a problem concerning thas
max-amount of adressible memory. I know nothing about Mac's or it's
compilers. However I know about people running over 10000 segments using
nec2dxs on windows.

> For item (2), I changed the NECPAR.INC parameter to 256 NGF connections.
> Does anyone know of a limit?

No, not from my memory and without a closer look at the source-code. At
least if nec2 is comparable in this with nec4.
 
> For item (3), I only found that I needed LD's after I got into the
> problem. Is there a limit there?

I once made the max-number of LD's agree with the number of segments and
succeeded running 5000 segments with this. However as I said this was done
using nec2 and I do not know how this also works with nec4 which was written
in a later Fortran version.

Arie.

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