I can't figure out the correct mechanism to access "global" nodes in a Spectre netlist from Verilog-AMS.  The following is what I have.  It does not work.

top.vams
Code:

`include "constants.vams"
`include "disciplines.vams"
module top ( );
  electrical (* integer inh_conn_prop_name="vdd"; integer
    inh_conn_def_value="cds_globals.vdd"; *) vdd;
  electrical (* integer inh_conn_prop_name="vss"; integer
    inh_conn_def_value="cds_globals.vss"; *) vss;
  ground vss;
  electrical out;
  sub sub1 (.out (out));
  analog V(vdd) <+ 2.5;
endmodule
 

cds_globals.vams
Code:

`include "constants.vams"
`include "disciplines.vams"
module cds_globals;
  electrical vdd, vss;
endmodule
 

subcircuit.scs
Code:

//
simulator lang=spectre
global vdd vss
subckt sub (out)
r1 (vdd out) resistor r=1k
r2 (out vss) resistor r=1k
ends sub
 

top.scs
Code:

tran tran stop=100u save=all
 

run.tcl
Code:

database -open output -into out -default
probe -create top -depth all -database output -waveform
probe -create -emptyok -database output -all cds_globals
run 1us
exit
 

Makefile
Code:

all:
	  rm -rf INCA_libs out
	  ncvlog -ams top.vams
	  ncvlog -ams cds_globals.vams
	  ncelab top -modelpath subcircuit.scs -messages -access +rwc
	  ncsim -ams top -analogcontrol top.scs -messages -input run.tcl
 

When I type "make", I get:

   inh_conn_def_value="cds_globals.vdd"; *) vdd;
                                      |
ncelab: *E,CUVHNF (./top.vams,5|39): Hierarchical name component lookup failed at 'cds_globals'.
   inh_conn_def_value="cds_globals.vss"; *) vss;
                                      |
ncelab: *E,CUVHNF (./top.vams,7|39): Hierarchical name component lookup failed at 'cds_globals'.

In trying to make this work, I also tried commenting this out, I also found that my probe statement in run.tcl doesn't work.

ncsim> probe -create -emptyok -database output -all cds_globals
ncsim: *E,PNOOBJ: Path element could not be found: cds_globals.

Can anyone tell me what I'm doing wrong?