After loading the design, in the library manager, right click the amplitude_modulator and choose Make Library Global. Then execute your do file again.
That's all.
the license features are not complete,cause i cant get a newer demo license from Adlec.
i hope someone who can request the least trial license from Adlec could share it
but,it seems you must create a library for “amplitude_modulator” first
correct me if i'm wrong,i'm not a Adlec hardcore user.
BTW, ald_syn_cad has answered your question.