I have created a symbol for AD844 in xDM Library Tool and added the symbol in the schematic by creating a new project, then I enable Setup => Settings => Licencing => Hyperlynx Analog library and assign model property file to the symbol which has *.cir extension but I see that the DxDesigner has created a new file with extension *.mod in sys folder. Is this DxDesigner format for spice models ? or it is a standard format for spice model *.mod ? Even after correct pin and port mapping there is an error that spice model is not assigned to the symbol. Any idea where something is wrong ?