( ESNUG 350 Item 7 ) --------------------------------------------- [4/27/00]
Subject: LVS with Cadence Diva And Running Dracula DRC In Standalone Mode
> I'm using the Cadence design kit DK_hcmos7_3.0 in combination with Cadence
> DFWII 4.4.3 and I've got the following problem whenever I try to perform
> LVS using Diva: no matter how I specify the location of the rules file
> (i.e. relative to UNIX file system or relative to the technology file),
> the run always fails. This is what I find in the file si.log:
>
> Running netlist comparison program: LVS
> Begin comparison: Mar 14 16:25:58 2000
> @(#)$CDS: LVS version 4.4.3 07/07/1999 20:05 (cds230) $
> *Error* strcat: argument #1 should be either a string
> or a symbol (type template = "S") - nil
> *Error* load: error while loading file -
> "<my_icfb_run_dir>/LVS/divaLVS.rul"
> *Error* load: error while loading file - "*loadstring*"
> End comparison: Mar 14 16:25:59 2000
> si: Comparison did not complete without errors.
>
> I observed that diva copies the rules file to the LVS run directory first
> and tries to read it from there. I don't understand why Cadence Diva
> operates like this and why it fails. Does anybody know any help?
>
> - Torsten Mahnke
> TU Muenchen Germany
From: Edward J Kalenda <ed@kalenda.com>
The location of the rules file is not the cause of the error. This looks
to be an error in the rule deck. I would expect that someone did not
account for a property being missing in a combine or compare routine.
The reason Diva copies the rule deck to the run directory is historical.
Before the 4.4 release, the rules were stored in the technology library
as properties. Since LVS runs as a separate binary from DFII, it has to
have the rules in a file to access them.
When the rules became external text files in 4.4 the behavior was not
changed. The developers will commonly ask for a copy of the run
directory when you have a problem. Having the rules file in the run
directory means they don't have to ask you too send it when you forget
to include it with the testcase data.
- Ed Kalenda
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From: Ben Geeraerts <ben.geeraerts@esat.kuleuven.ac.be>
Is it possible to run Dracula DRC in an interactive way (like Diva). Not
as a standalone product ??
- Ben Geeraerts Belgium
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From: Edward J Kalenda <ed@kalenda.com>
I believe that is part of what InQuery does. I think they also call it
Dracula Interactive in the Cadence price book.
- Ed Kalenda
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From: Ben Geeraerts <ben.geeraerts@esat.kuleuven.ac.be>
Thanks for your response. But I am still puzzled...
I can indeed view the Dracula simulation results with InQuery once a
simulation is done, but what I really need is a way to ineractively start
Dracula simulations, view them, edit design, resimulate and so on. I do
not think this is possible with the default Dracula standalone verification
tool and InQuery. You still need to start a Dracula simulation offline.
Does someone know if additional licenses are required and which binaries
are involved with this Dracula Interactive Tool ??
- Ben Geeraerts Belgium
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