[PCB_FORUM] Re: NO_RAT property appearing from schematic

This has been a "feature" of allegro for a
real long time. How can you guys not know it?
I think I read somewhere in one of the help
files that any net with over 50 connections
is automatically rendered with the no_rat
property to keep the ratsnests from becoming
too complicated when they are displayed.
You can delete it, of course, but you won't find
where it is added. I don't think there is any
way to keep it from happening, either. Maybe
you could ask Cadence and see if there is
some kind of setting that would keep this from
happening if you don't want it to for some reason.

Kevin McCowan
Sr. PCB Designer
TSI Telsys

William Billereau wrote: 
all power nets are treated like this.
Automatically, it have NO_RAT property.

I do not know where it comes from, but it seems to be done by the packager or the netrev process.

   William.

----- Original Message ----- From: "Daniel So" <danielso@xxxxxxxxxxxxx>
To: <icu-pcb-forum@xxxxxxxxxxxxx>
Sent: Thursday, April 28, 2005 5:22 PM
Subject: [PCB_FORUM] Re: NO_RAT property appearing from schematic



I started this from another design. However, when I came across this
problem I imported the netlist onto a brd created from scratch and still
got the same results.


Daniel So
1065 La Avenida
Mtn View, Ca 94043
(650) 693-2054
email: danielso@xxxxxxxxxxxxx
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of William Gerner
Sent: Thursday, April 28, 2005 8:19 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: NO_RAT property appearing from schematic

Did you start your design from scratch or use some other board as
the start point?

Daniel So wrote:

I am reading in a netlist from Concept which is suppose to have no
constraints or properties. However, I am getting a NO_RAT property on
the GND net. Doing a search on the ascii files of the schematic pages
shows no instances of this property. The property does not appear in


any

of the dat files created from Concept. Any ideas where this property 

is

coming from?



Thanks for any ideas



Daniel So

1065 La Avenida

Mtn View, Ca 94043

(650) 693-2054

email: danielso@xxxxxxxxxxxxx




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