I'm currently trying to setup extraction for the IBM, soi12 PDK (Calibre V2014.2 I think) . Unfortunately, I'm having a few issues.
For one, when I select "Use Names from Layout" in the PEX setup form, no PEX netlist is generated until I first run LVS in the PEX run directory. There are no errors or warnings printed to the transcript. Secondly, even if I run LVS first and successfully generate the PEX netlist, I'm not able to use the map schematic net tool for nets not connected to pins (as I seem to be able to if I select "Use Names from Schematic".
I realize that I'm probably missing something fundamental, but I've not been able to understand this behavior from the documentation. Any help would be greatly appreciated.