I have a little problem with my Cadence Virtuoso Layout Suite XL, when I work with the AMS 0.18.
The problem concerns the vias: few days ago the vias RX_M1, etc... were available in the panel "Create Via", now I can see them only if I use "Add Istance" .
Did somebody update the PDK or the project environment
unbeknownst to you?
Possibly failing to get an XL license and giving you a
fallback "L" license?
Personally, I like to make flat local-library via cells in various
MxN configurations, just so I "own" it and not the deputy
junior sysadmin du jour. Think of your design as a ship at sea -
best bring everything you need and no "IOUs".