the DRR report flags them, but although useful it does stop reporting
after some small number
you have to keep running it whilst fixing to be sure they are all gone

it is at the bottom of the DRR and also shows the location
they do have to be exactly at the same point

here is another idea
(got from Mike Reagan who saw in protel KB somewhere)
we had a bunch of doubled pads and vias (a product of spectraa and
protel comps which had built in stringer pads)
this would of course make double drill hits

make a CLEARANCE design rule called perhaps DUPE
object kind A: check vias, thru hole pads

object kind B: check vias, thru hole pads
any net
clearance = 0

this works for flagging them too and will light them all up whereas as
mentioned the drill report gets tired and stops after a few

* as i remember you must disable the other rules
also this has the advantage of showing overlapping drill hits that are
not exactly at the same spot

Dennis Saputelli

Brad Velander wrote:
> 
> Ok, I know this is a no-brainer but this afternoon that suits me just fine,
> I seem to be short some grey matter.
> Where within Protel does it check for double drill hits?
> I know that sometime in the past I have had this flagged when doing a design
> or outputting fab files.
> However I just got word that a number of designs that were panelized while I
> was gone, had many double hits on the drills. To solve this in the future, I
> am trying to find the correct design rule, or check point to ensure that
> everyone else is using this facility to check their boards. The problem is
> that I just can't find it at the moment.
> 
> Sincerely,
> Brad Velander.
> 
> Lead PCB Designer
> Norsat International Inc.
> #300 - 4401 Still Creek Drive,
> Burnaby, B.C., Canada, V5C 6G9.
> Tel   (604) 292-9089 (direct line)
> Fax  (604) 292-9010
> Website: www.norsat.com

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