...
Right click on Setup > Edit > Location >Browse, and locate the Abaqus input file.
Once the Abaqus file is imported, make sure that the Unit System selected are in mm. Click on the Data Source cell (Cell A2), then check the unit system is as shown below:
Click on the Project Tab to return to Project Schematic. You should see an update symbol next to Setup. This means the input file has been loaded and External Model is ready to generate a Modelmodel.