In addition to assigning the model, which you did with the SIGNAL_MODEL property, you must also add the model/DML file as a reference library.Originally posted in cdnusers.org by djs
To do this you have two options. The first is an environment variable named "SIGNAL_DEVLIBS" which gets set in your env file and causes Allegro to automatically included specified DML files as reference libraries. You can read up on usage in the on-line documentation.
The second option is to interactively add the DML as a reference libaray. To do this open the board in Allegro PCB SI, and select the menu item "Analyze->SI/EMI sim->Library". This will open the SI library browser. In the browser select the "Add Existing Library->Local Library" button located below the upper pane labeled "Device Library Files". This will open a directory browser in which you can point to the DML file that includeds the model(s) you assigned.