Net names in Calibre generated SPICE list

I am using Calibre PEX for parasitics extraction in Cadence Custom IC,
and I need to further process the netlist that is generated by
xCalibre. My major problem is that all the net names are converted to
numbers and this numbering system is used to identify names. I need to
keep some specific names on some nets.

I have the impression that I can use labels drawn on a specific layer
on the layout. Then in the calibre rule file add a statement like the
followng:

LAYER textL 510
LAYER MAP 230 DATATYPE 0 510
LAYER MAP 230 DATATYPE >= 0 230
TEXT LAYER textL
ATTACH textL Metal5 MASK

where 230 is the layer number of the layer which I use to draw the
label ('text), and datatype 0 is the purpose used ('drawing')

I have put some labels on Metal5 layer, but it seems that I have
missed something important. Could someone please enlightenme on what
is wrong?

 

Sorry -- I am guessing here ... but ...

In Diva PRE, when you create parasitic metal, labels are lost on metal
lines.
You can however label lines where they connect to other layers.

(i.e. put your label ontop of a VIA to Metal5 ... )

The problem the tool has is that the Metal is now a distributed resistor
between connections.
Your label ends up somewhere in the middle of the resistor.

I think you can translate this idea to Calibre PEX

-- Good luck
-G