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# Re: [femm] Problem with my very first design

- To: femm@yahoogroups.com
- Subject: Re: [femm] Problem with my very first design
- From: David Meeker <dmeeker@ieee.org>
- Date: Wed, 16 Apr 2003 17:44:14 -0400
- In-reply-to: <b7kba6+g3g5@eGroups.com>
- References: <b7kba6+g3g5@eGroups.com>
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`tano1938 wrote:`

>     Well, I finally got my first design input into femm (thanks to a lot
>     of help from Dave) and when I try to run the solver, I get the
>     message that "material properties have not been defined for all
>     regions." I tried many changes but I always get the same message. The
>     downloaded file is "FRT_OLD.fem." It is the magnetics for a simple
>     voice coil motor. Can someone please help.

> `Thanks`

`This could be a "bad DXF" import example--there are a bunch of nearly coincident points in the geometry that make sliver-thin regions with no material definition. The "easy" cure is to specify a bigger number for the tolerance in the DXF import, so that these nearly coincident points stand a better chance of getting consolidated. Anyhow, I put a modified version that I manually checked (run triangle and look for regions with a super-fine mesh to identify problem areas) at:
http://groups.yahoo.com/group/femm/files/frt_mod.fem`

    Dave.
    --
    David Meeker
    email: dmeeker@ieee.org
    www: http://femm.berlios.de/dmeeker

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