i use vhdl toolbox to simulate a testbench of a inverter in virtuoso. 'a' is input und 'z' is output. but waveform are not showed.
the error message is
ncsim: *E,OBJACC: Object must have read access: :a.
ncsim: *E,OBJACC: Object must have read access: :gnd.
ncsim: *E,OBJACC: Object must have read access: :vdd.
ncsim: *E,OBJACC: Object must have read access: :z.
why?