Paul,
Good day Aye!
How goes it across the pond ?

Just read your email.

The problem/FEATURE in PADS POWER PCB Ver.2.1 you are experiencing is
from the ECOGEN netlist compare utility.  When two files are compared
and no track width is defined in either netlist file,  the ECOGEN
program will ADD a zero (0) track width to the end of a * SIGNAL*
statement.   I don't know why they (PADS) do this but they do.  The
PADS ECO file allows a track width to be specified after the net name
so as you can setup your track widths prior to IMPORTING your ECO
file.   Also note that if you have a net with a plus sign on it ie:
+5V or +3.3V it will assign a track width of 5, 3 or whatever the next
character/numeral is to the end of that signal statement.

The easiest way to handle this inconvenience is to edit the ECO file
prior to attempting an ASCII IN.
Go to the NET section of the ECO file you are about to IMPORT and with
a text editor do a search for " 0"
That's "spacezero" without the brackets.  This should take you down to
the first net in the file.  At this time you can go ahead and do a
Replace ALL command from " 0" to " 8". This will give you a valid
track width between 1-250.  We use an 8 for 8 mil line as our default.
 If no track width is defined in the ECO file when an IMPORT is run
then the default track width in your PADS design at that time will be
used.

Hope this helps.

Example: Prior to editing the ECO file

*NET*
*SIGNAL*  +3.3V 3
R158.1 R162.1 U8.14 J19.20 J17.1
*SIGNAL*  GND 0
U8.3 U8.4 J18.51 J19.21


Example: After editing the ECO file

*NET*
*SIGNAL*  +3.3V 20
R158.1 R162.1 U8.14 J19.20 J17.1
*SIGNAL*  GND 20
U8.3 U8.4 J18.51 J19.21

If you have any questions give me a shout.


Regards, Greg.

Gregory E. Bordash,
Team Leader, PCB CAD Group
ATI Technologies Inc.,
33 Commerce Valley Drive East,
Thornhill, Ontario, Canada, L3T 7N6
Phone:(905) 882-2600 ext: 8370,   Fax: (905) 882-9339
Email: [log in to unmask]

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