Leo,
Good call. Yes I have had such problems previously with nuisance 0 mil
lines/arcs. Particularly arcs with 0 degree arcs or 0mil radii. Sometimes they
can be formed during import of ACAD DXF information or the most common
occurrence of 0mil arcs I ever saw was during routing with arc mode enabled.
When routing with arc mode there are a lot of 0 degree or 0 radii arcs created
at the transition between straight traces and the arced corners. Possibly those
were even 0mil length traces at those transitions, haven't done it in so long
because of the problem I can't recall positively.
Sincerely,
Brad Velander
Senior PCB Designer
Northern Airborne Technology
#14 - 1925 Kirschner Road,
Kelowna, BC, V1Y 4N7.
tel (250) 763-2329 ext. 225
fax (250) 762-3374
-----Original Message-----
From: Leo Potjewijd [mailto:[EMAIL PROTECTED]
Sent: Thursday, May 25, 2006 4:23 AM
To: Protel EDA Discussion List
Cc: Protel EDA Discussion List
Subject: Re: [PEDA] Something off the board
My EUR 0.02:
I don't know if these things still exist in the version Laurie is
using, but in P98SEsp6 it is possible to have a zero-length segment
of track. Invisible, even when selected, but they can still get
selected by drawing a selection window or by global edits.
They are usually -inadvertedly- created by moving an endpoint onto
another endpoint of the same track. Lock and netname properties of
these objects still apply, as may do other properties.
After some testing I found that it is also possible to create nearly
invisible (just one pixel wide at any zoom factor) arcs or strings,
using zero or negative trackwidth.
Also, adding the .Legend special string influences the place where
your preview ends up on the page, depending on the number of
different holes you use; even when the legend only displays on another page.
Last but not(?) least it could have been a freak bit error that
changed a coordinate into the negative realm, I found the program's
behaviour then erratic at best...
Leo
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