Mismatched device problem of Assura LVS

[Adam]

Dear All,

I got some strange problems when doing LVS using Assura. There
are s
ome mismatched devices. When I open the device mismatch tools for
detail,
I found that some of the devices which are shown in the schematic info
window
are not found in layout(in the window of layout info).
Howevere, I did see all these devices in the layout window. When I
tried to
view the netlist from Layout window(Assura->view netist), no netlist
is shown
and

In the CIW:

\a vuiOpenReference()
\w *WARNING* Pattern "opppcres" not found.
\w *WARNING* Pattern "available." not found.
\r t

Is there something I missed?

Thanks a lot,
Adam

 

[layoutDesign]

On Feb 3, 8:32 am, Adam <wang.adam2...@gmail.com> wrote:
<snip>

 I got some strange problems when doing LVS using Assura.  There are some mismatched devices. When I open the device mismatch tools for detail I found that >some of the devices which are shown in the schematic info window are not found in layout(in the window of layout info). However, I did see all these devices in the >layout window.  When I tried to view the netlist from Layout window(Assura->view netist), no netlist
is shown and
In the CIW:

\a vuiOpenReference()
\w *WARNING* Pattern "opppcres" not found.
\w *WARNING* Pattern "available." not found.
\r t
snip

I believe most LVS verification tools use a netlist to netlist
comparison. They use the netlist generated from the schematic versus
the netlist generated from the layout (boolean operations). So it
would seem your problem may be more of a netlisting issue with the
schematics?? Maybe there are some devices that are not defined
somehow?? Would be interesting to see what your issue is, because I
need to get more familiar with Assura because it is good and
relatively cheap, and farely widely implemented.