I'm not sure how to respond.  I use the short ciruit rule for standard DRC
and it has not given me problems.  I must admit, however, that I pay more
attention to the clearance contraint when correcting errors than the short
circuit constraint.  And once one is fixed, the other is fixed.  It's set up
by default, and I only tend to pay attention to it when situations like the
one noted below come up.  Because I do mostly DUT boards, there is not much
variation in my design rules.

Dan B.

----- Original Message -----
From: "Brad Velander" <[EMAIL PROTECTED]>
To: "'Protel EDA Forum'" <[EMAIL PROTECTED]>
Sent: Thursday, April 25, 2002 4:30 PM
Subject: Re: [PEDA] FBGA fan outs with no net name


> Dan,
> have you found some certain condition where the Short circuit
> constraint works? Previously most of us have thought it was broke (a bug),
> because we could not get it to do anything correctly in the circumstances
> that we tried.
>
> Sincerely,
> Brad Velander.
>
> Lead PCB Designer
> Norsat International Inc.
> Microwave Products
> Tel   (604) 292-9089 (direct line)
> Fax  (604) 292-9010
> email: [EMAIL PROTECTED]
> http://www.norsat.com
>
> Visit us at Booth 2G2-09 at CommunicAsia 2002 in Singapore June 18-21.
>
>
> > -----Original Message-----
> > From: Dan Beaudoin [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, April 25, 2002 4:09 PM
> > To: Protel EDA Forum
> > Subject: Re: [PEDA] FBGA fan outs with no net name
> >
> >
> > Yes.  In Design Rules go to Other tab and select Short
> > Circuit Constraint.
> > When you pull it up, change both of the Objects Filtered
> > boxes to say Net
> > Class rather than Whole Board and select All Nets.  That will
> > get rid of the
> > error.  However, I would wait until the rest of the DRC is
> > clean, because if
> > some net gets tied to a free primative (tooling hole or such)
> > that has no
> > net, it will not report it as an error, and you could end up
> > with an open on
> > the final project.  Of course, if everything on the board is
> > a component, it
> > should not be a problem.
> >
> > Dan B.
> >

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