how to fix the cdl file import error in virtuoso, please expert help on it.

wgf08062000

i created a cdl netlist by  N7 memory compiler , then i imported the cdl into virtuoso app, and the cdl netlist did not find nchpd_hcsr_mac: symbol error throw out ,

how to fix it ? i try to find it in pdk, but no nchpd_hcsr_mac, can help on it? thanks