Subject: RE: [IBIS-Users] ERROR in .pkg file
From: Dunbar, Tony (tony_dunbar@mentorg.com)
Date: Fri Apr 12 2002 - 12:20:28 PDT
Syed,
A lower matrix triangle refers to the row/column section of a matrix below
the main diagonal. Only the upper-half matrix should be used. Symmetry in
the usual Maxwell matrix means this is sufficient.
The numbers in your example look like they are probably from the inductance
matrix, but I'm guessing just from the scale of the numbers.
What type of (inductance) matrix are you meant to be using, according to
what is specified in the .pkg file? Banded, Sparse or Full? The format of
your example looks like Sparse.
I'm guessing that the source of your problem is that the index AV34 is
alpanumerically before the current [Row] AV35 and this conflicts with the
ordering defined in the [Pin Numbers] section and the reconstruction of the
matrix attempts to place it in the lower-half.
Errr, unless there's a bug in the parser!?
Regards,
Tony
-----Original Message-----
From: Syed Huq [mailto:shuq@cisco.com]
Sent: Friday, April 12, 2002 12:47 PM
To: ibis-users@server.eda.org
Subject: [IBIS-Users] ERROR in .pkg file
Hi,
The IBIS parser gives the following ERROR on a .pkg file:
ERROR (line 5100) -
This Row Column Index defines an entry in the lower matrix triangle.
ERROR (line 5101) -
This Row Column Index defines an entry in the lower matrix triangle.
<extracted from .pkg file>
5098 [Row] AV35
5099 AV35 1.60634E-08
5100 AV34 8.46141E-09 <--Error on this line
5101 AW35 1.00513E-08 <--Error on this line
5102 [Row] F23
Can anyone give a bit more detailed explanation of what this ERROR
message from the parser means and how to debug this ?
I wish the parser output was more descriptive..What is a lower matrix
triangle..
Syed
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