Mitch,

I have seen about 5 or 6 responses verifying that there was a
problem with RS274 on release 13.  What happened here is that
we hadn't used RS274 prior to this revision of the board.  I had
been generating Gerber using the 'old' method with aperture table
without a problem and never dreamed going to RS274 would matter.
My Gerber was generated ok, just one of the shapes was missing
and no errors or warnings to indicate any problems occurred.  Since
it was on an area of a relatively large, dense board that we didn't
even make any changes to, and the factory needed the boards asap,
we were remiss in checking it (we only checked where we made the
changes).  Anyway, we'll be going to Mentor soon :-( and so
Cadence has not been updated with new releases.  When I went
back and generated the same artwork with Gerber 600x Format,
it was created just fine and everything was there...

The moral of the story- if it ain't broke, don't fix it!

Regards,

Mark F. Walter, CID - Staff P C Board Designer
Motorola Personal Communications Sector
Smart and Connected Products Group - West
5401 N. Beach St., Fort Worth, TX. 76137-2794

Telephone: (817) 245-2366  FAX: (817) 245-4850
Email: [log in to unmask]
Pager: 1-800-SKYTEL2(7598352) PIN# 2452366


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Mitch Morey wrote:

> ---------Included Message----------
> >      From: "Olson, Jack" <[log in to unmask]>
> >      Subject: Re: [DC] Cadence Allegro RS274x Artwork Bug
> >      I disagree.
> >      The GERBER 274X format has been out since the 80's I think. >
> If Cadence hasn't figured it out by now, either someone isn't
> >      complaining loudly enough or you are being ripped off!
> >      Even the cheapest CAD programs in the world can write 274X.
>
> Ah Contrair Jack,
>
> Cadence did figure it out long ago. Most of the problems I've
> encountered (mostly heard of) were because of either weird database
> units or "these darned advanced shape fills". If you're only aware of
> good design practices with your CAD packages these normally wouldn't
> crop their ugly heads. Best to learn how best to view/plot your gerbers
> and do a final, thorough exam of all your layers.(!)
>
> (Ever see a whole group of people rush to put out a fire because one of
> their own started it? Who do you think would get the blame? Of course,
> the match manufacturer!)
>
> Good day.
>
> Mitch
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