Change your switch view list to put 'veriloga' before 'symbol'
and 'cdsSpice' and then try to switch-view (descend) into
the instance. If it's really in the right place to be found, this
should open you a text editor with the verilog.va code. If
this fails, you are on the track that Spectre netlisting is failing
to traverse, at least, and can look around in context.
By way of debug, you might try making a schematic rep of
the CNFET (like a crude JFET generic inside a set of pins)
and see how that runs. Then if this works (functionally)
set up a config view for the sim testbench schematic
(Hierarchy Editor) and kick off your simulations from this
view instead, so you have both schematic based simulation
and fine grained control over view-switching. If hierarchy
editor / config view fails to show your veriloga, that would
have to be a clue; if it finds it, then at least you can
toggle around and control netlist hierarchy / view switching.