The licesense feature you're asking for is 'Affirma_NC_Simulator',
but if you rum AMS with pure verilog code, no mixed mode simulation you
only need the feature 'NC_Verilog_Simulator', I guess.
Then you have to run 'ncsim' rather than 'ncvlog'.
Or possibliy you have a 'Virtuoso_Multi_mode_Simulation'
feature then you should use 'ncsim -amslic'.

Just guesses you have to try it.

Bernd

Affirma_NC_Simulator:            
Is for Mixed Mode simulation, means Verilog and
VHDL what you described as 'NC-Sim
Mixed-Language Simulator'.

NC_Verilog_Simulator:            
Is for Verilog only simulations.

Virtuoso_Multi_Mode_Simulation:
Is for the analog simulation, you can
run different analog simulators with different                              
quantities with it e.g. Spectre, Spectre RF,
UltraSim and it's also required for AMS                                    
Designer. Because AMS runs one of the
analog solvers Spectre or UltraSim under
the hood.


I hope this enlightens things a bit.

Bernd